My question is
If I want to get my first address back. How many time will I click so that I will get back to the first address. Or had any address that past has past. If yes. What of If their is matter that they want me to generate that particular address back from my wallet. What will I do?
It really depends on the service you're using. With a non-custodial wallet like Electrum for example you'll have access to all your previous addresses, but with a custodial wallet like the one you're showing maybe you won't have access to older addresses.
Most probably every time you click that button a new address is generated and there's no way of going back. Don't worry though, that previous address is still valid and if you receive bitcoin there you'll still get it.
By the way, I noticed you don't want to make this address public as you redacted it, just letting you know that the QR code contains the full wallet address you're redacting, so make sure to redact the QR Code as well.