Good to see we're making progress 😊 

So, if there is no coin inserted, and no fingerprint read, you want to see a welcome message.
We could do that this way:

void loop() {
  int FingerPrintResult = getFingerprintIDez();

  if (FingerPrintResult != -1) { //This function keeps looping and waiting for a fingerprint to be put on the sensor
    OpenDoor();
  } else {
    coinSlotSignal = digitalRead(coinSlot);

    if (coinInserted) {
      coinInserted = false;

      EEPROM.write(0, coinCount);
      Serial.println(EEPROM.read(0));

      lcd.setCursor(0, 0);
      lcd.print("TOTAL:");
      lcd.setCursor(0, 1);
      lcd.print(coinCount);
    } else {
      lcd.setCursor(0, 0);
      lcd.print("WELCOME");
    }
  }
}

This may come with an issue that the displayed "TOTAL:" may disappear too fast.
We could use a timer for that if this is the case, or add a small delay (a delay may be undesirable though).

Something like this:

...
unsigned long StartTotalTime;
#define ReplaceTotalTime 2000  // keep Total visible for 2 seconds
...

void loop() {
  int FingerPrintResult = getFingerprintIDez();

  if (FingerPrintResult != -1) { //This function keeps looping and waiting for a fingerprint to be put on the sensor
    OpenDoor();
  } else {
    coinSlotSignal = digitalRead(coinSlot);

    if (coinInserted) {
      coinInserted = false;

      EEPROM.write(0, coinCount);
      Serial.println(EEPROM.read(0));

      lcd.setCursor(0, 0);
      lcd.print("TOTAL:");
      lcd.setCursor(0, 1);
      lcd.print(coinCount);
      StartTotalTime = millis(); // store this time
    } else {
      if(StartTotalTime+ReplaceTotalTime<millis()) { // 2 seconds passed? Then show "WELCOME"
        lcd.setCursor(0, 0);
        lcd.print("WELCOME");
      }
    }
  }
}

What this does:

1. We define StartTotalTime to store the time when a coin was inserted.
2. We define a wait time, before WELCOME replaces TOTAL in ReplaceTotalTime in milliseconds (1 second = 1000 milliseconds)
3. When a coin is inserted we reset StartTotalTime to the current time.
4. Each time we want to show "TOTAL:", we first check if the StartTotaltime + ReplaceTotal is less than the current time.
    If that is the case then we have waited indeed 2 seconds and the "TOTAL:" will be replaced by "WELCOME".

I hope that made sense 😊 

@hans what if I want the lcd display that it will display " SECURED COIN VAULT " after "TOTAL" also after "WELCOME raven " ?

You'll have to define when either of these messages are show.

For example:

Default: SECURED COIN VAULT
At fingerprint: WELCOME
At coin insert: TOTAL

In that case you'd get something like this:

void loop() {
  int FingerPrintResult = getFingerprintIDez();

  if (FingerPrintResult != -1) { //This function keeps looping and waiting for a fingerprint to be put on the sensor
    lcd.setCursor(0, 0);
    lcd.print("WELCOME");
    OpenDoor();
  } else {
    coinSlotSignal = digitalRead(coinSlot);

    if (coinInserted) {
      coinInserted = false;

      EEPROM.write(0, coinCount);
      Serial.println(EEPROM.read(0));

      lcd.setCursor(0, 0);
      lcd.print("TOTAL:");
      lcd.setCursor(0, 1);
      lcd.print(coinCount);
      StartTotalTime = millis(); // store this time
    } else {
      if(StartTotalTime+ReplaceTotalTime<millis()) { // 2 seconds passed? Then show "WELCOME"
        lcd.setCursor(0, 0);
        lcd.print("SECURED COIN VAULT");
      }
    }
  }
}

As with the delay we created with StartTotalTime and such, we may need something like this for the welcome message as well. You'll have to try and see if the message is visible long enough for your purposes.

@hans Thanks sir all credits goes to you. I will try it sir

@hans sir How can I upload a video here?

You can drag a video simply on the text editor when writing a reply 😊 

Note: if the video is too big, you may get a warning and the video wil not be uploaded.
Let me know if this is the case, then I can see if I can help with that ...

@hansit says video is big

I see ... how big is the video file?

@hans 140 mb

@hans I wanted you to show the problem of the solenoid lock if I enter the fingerprint it sends 5 second delay to make the solenoid goes to lock again, but after that its like sensding signal to arduino board then it shows TOTA = to 9 

Posted by: @kalilinux25

140 mb

Yikes! That's a huge video file. 😱 
You may want to pull that through something like Handbrake to optimize compression.
If you'd like you could dump the file on Dropbox, OneDrive or Google Drive (which ever of these you may be using) and share the file there.
I can download it and compress it, or at least see it 😊 

@hans. Thanks for understanding sir https://drive.google.com/file/d/1dxYtB-8TO8wKrY-sw2tPILIHh5X9W9fB/view?usp=drivesdk

@hans someone suggested that I might need to usea aboolean function for may pin of pin 4 and make it false

Wel, I've pulled your video quickly through Handbrake and it's only 3 Mb now 😉 

Can you post the full code?
I did see one potential typo, corrected here .. but I'd need to see the full code to determine what else may be wrong.

void loop() {
  int FingerPrintResult = getFingerprintIDez();

  if (FingerPrintResult != -1) { 
    lcd.setCursor(0, 0);
    lcd.print("WELCOME");
    OpenDoor();
  } else {
    coinInserted = digitalRead(coinSlot); // < ----- changed this

    if (coinInserted) {
      coinInserted = false;

      EEPROM.write(0, coinCount);
      Serial.println(EEPROM.read(0));

      lcd.setCursor(0, 0);
      lcd.print("TOTAL:");
      lcd.setCursor(0, 1);
      lcd.print(coinCount);
      StartTotalTime = millis(); // store this time
    } else {
      if(StartTotalTime+ReplaceTotalTime<millis()) { // 2 seconds passed? Then show "WELCOME"
        lcd.setCursor(0, 0);
        lcd.print("SECURED COIN VAULT");
      }
    }
  }
}

@hans i ve found the answer sir using a diode