can't helpwith the first train second train is a 4-6-2 wheel base Heavy Pacific i'm pretty sure. The third loco is a 4-8-8-4 challenger class locomotive famously known as the union pacific challenger. Hope i was of help, are these brass models or plastic models?
photo #1 2-8-0 Consolidated class. Possibly brass,,looks like there is some brass.
photo #2,,,with the number on the tender that is usually AT&SF, a 4-6-2 Pacific class.
photo #3 looks like a Big Boy sans tender.
Those models are definately OLD models,they look old to me,any makers marks on them?
Usually someplace on the bottom,,like Rivarossi for example,,or look for "made in Austria" or someting like that.