Except for the one in the larger box these all appear to be reletted Micro-Trains models. The top right one looks like an Seaboard System car and some of the other ones have the road number in what looks like the Union Pacific font/typeface.
Gotta' LOVE "new to me" cars !!! Being from IL, I also love grain cars. That collection is GREAT !!! Funny story about that. Bought a bunch (15) of Con-Cor TFM Auto Racks. Thinking, " COOL !!! NOBODY around here has ever seen these before !!!" Reported for jury duty a few days later and saw BNSF pull a string of 30 of them through Joliet, IL. I was SO DEFLATED !!! Ha,ha,ha !!!