Preserving Roadkill Fox?

My friend contacted me yesterday about a roadkill fox/coyote looking animal she found yesterday, I looked at some pictures of it and the pelt looks fine, but the face is a little blown out and the back legs of it seem twisted and scraped. The front legs are fine and the tail are too - which is why I am thinking of maybe skinning it and tanning the whole thing, but since I haven't seen it in person, I'm not sure if I'm going to take the whole pelt or just the feet and tail.
As of right now, I don't have any tanning solution or any knowledge of how to tan a pelt or preserve parts of an animal. Any help/advice would be appreciate as how I would go about this situation!