Old outboards are like potato chips....you can't have just one. There is some impressive old iron in those pix, including an old italian-built Bundy 40hp outboard from the early sixties, very cool. plus (OMC built) Vikings (Canada), Scotts, Firestones and even a Husquivarna (!).
I think its a safe bet that most of that stuff, especially the old OMC motors would run without too much coaxing. I picked up a cherry 1973 25 Johnson in 2001 that spent its life in a clothes closet after 1974. The elderly couple who had it passed away, the house was sold and the young couple who bought the house found it and put out with the trash, not really knowing what it was or what it was worth. It came home with me, I still have it and it looks and runs like new. I bought a NOS Johnson dealer display stand for it and now its a decorative piece at the beach house.
Gotta warn you though, messing with old outboards is an easy habit (good or bad) to get into.