As others have said, scouring Marketplace and Craigslist (or its local equivalent) is going to be the best way to get started with an enlarger, etc....
With the obvious caveat that all relatively modern biogon-type lenses will be great, I've used both the 65/8 Super Angulon (oddly mounted in Copal 0...
Beseler went to a very dense (like particle board) with a laminate cover. I would find some really nice 3/4 " plywood and double it up. Unless you're...