Norton 360 Help Needeed

Today, I bought a Norton 360 Serial Key off of eBay. The guy gave me a legit 2 year key. Although, he did give me a email and password to log in with. I thought I could use the key on my account but I guess not. However, the key is only for my computer. When I log into the account online, it still has all his credit card information and everything. So I am thinking this is still his main account. I am not going to be a d hole and buy all kinds of expensive crap because I think its funny, but I did change the password because I did a back up to Norton's online memory.

If I changed the password on the Norton account, will he get an email what the new password is? Even though he can probably change it like nothing, I don't want him having access to my online files.

Also, if I save my credit cards and passwords with Norton 360 on my the account, will he be able to view it or is that only for my CPU?


I am poorly educated when it comes to Norton 360 so any explanation of what I should is VERY appreciated. Thanks.