You got some euro-rail stuff and some american rail stuff.

Quite a few rare pieces. I would look these things up on ebay.
Even in not very good condition, some of these may get a pretty penny.

If you are actually going to make any of this run, there are new motor and gear kits. But you probably already knew this. Regeared so many Athern Engines, they work much better with big flywheels and brass worm drives.