Could someone tell me where I can find information (especially year) about specific albums / tracks
You can also try www.cdnow.com. While they do not have lots of old info, they have the new stuff and some stuff not in AllMusic (track listings for one but not on all releases).

Also, www.cddb.com is a way to maybe find a song if you do not know the album or artist. Tons of stuff in their database.