If you are using Internet Explorer then click on "Tools" > "Internet Options". Then click the "Content" tab and then click "Settings". Under "AutoComplete" check the options you want and then click "Apply".
I believe AOL uses a bastardized version of IE so it may be similar. If it isn't then this information is useless. I haven't even looked at AOL in years.
BTW: I STRONGLY discourage you from saving passwords on your browser/computer. It's just an invitation for hackers or someone stealing your PC to get access to all of your accounts.
It's better to use one "REALLY GOOD" password for all your accounts. By really good, I mean something like, TrIP769432CrUZ.