new to PriusChat and Prius ownership

I just became a Prius owner for the first time last week. Bought a 2008 with 170,000 miles in great condition. Loving it so far, but I still have so much to figure out.

Is there a definitive reference somewhere as to what features wwere standard or optional for this model? I think I figured out that it's "Base" trim based on what I saw on KBB, and my car seems to have a lot of the optional features, like leather and JBL speakers. Would be nice to work out exactly what I have.