I will throw some up here shortly. There is quite a lot of stuff, I am still trying to organize it and figure out what everything is. A lot of pictures to take.
So far, what I know there is, based off pictures I found in the rulebook. Are a Possessed warband, a bunch of Skaven stuff, and human mercenary stuff. I am unsure about the Skaven and humans. They are clearly those things, I can tell this much by the models, and pieces. I just don't know exactly what models they are. The Possessed however, appear to be from an original box set of the Possessed warband, and all of the original models from the box set are there. And obviously, the rulebook is there as well.
Then, there are a bunch of random other pieces. Some look like undead, some vampire stuff, dogs, rats, a big ogre looking thing with a half dragon body. A bunch of snake men, and something that looks like elves with lizards. Zero idea what any of this stuff is, it isn't pictured in the rulebook, or found on any Google searches related to Mordheim. But some of it does pop up in other GW Warhammer searches.