Welcome to iMore! I'm sorry but I don't understand your question. It looks like you have forgotten your restrictions passcode and your volume button is broken. Let's take this one at a time.
1. The only way to reset your restrictions passcode is to restore your device using iTunes. You'll need to set it up as new unless you have a backup from before the restrictions passcode was set.
2. Are you able to go to Settings > Sounds and adjust your volume there?