How do I use models from here in Blender?

[eureka]

You can import the OBJs in blender by going to File>Import>Import Wavefront Obj (I think, anyways, I'm not on my laptop so I can't confirm).
That's about the extent of my knowledge with blender. No idea about textures and the like.
E: Mtl files are also associated with OBJs, they contain texture paths for the model.