If there was an exisiting website that you will put an adsense code in it but the account was banned but not that site. Will your the adsense account owner get banned also? For example before the bann: both sites have the same adsense account site1: was ok site2: broke a rule and the result banned. If I put an adsense account on site1 will my account get banned?
Yes without a doubt. Google does count this case based on each account privilege and not the website itself. It would be counted as "related account" and you will not earn from any single clicks you made anyway.