The UK AOL didn't have America Online, just AOL if I remember correctly. Our first version was 4.0, as I used to have a shitload of AOL 4.0 discs. (Late 90's)
As to what I went on back then, I honestly have no idea. The oldest account i've got for anything is my original AOL email account, followed by 2005 Newgrounds. I also used to play Age of Empires 2 on MSN gaming zone.