So Mr. Snaky-snear used to be a tenant and left his old clothing behind when he moved out? Well, they do happen to make cheap pairs of painter's coveralls, aka "bunny suits" that can be had at the local big box hardware store. Those, some good breathing masks to avoid inhaling the debris, heavy latex gloves for stuff that has to be handled, and a 5 gallon wet/dry vacuum and he'd be about set to engage in a snake delousing excercise. Any good autoparts store would be apt to carry a good grade of carpet/upholstery cleaner, or you could mix something up using commercial grade products like get used by office cleaners or janitors.
Sorry but i can't help with the interior or doors. All my interiors have been variants in the shade of red. I do happen to have a trunk lid and some of the poly-vinyl bumper covers and I think, even the front fascia but all for a 78. Might even be that rear bumper cover chrome strip but it is likely not so chromed any more. Doors? Yes and No. They are a year correct pair for 78-80 BUT, I crated them up in a packing box the size of a refrigerator more than 15 years ago and they are still in there but in what condition is open to question; something similar to the notion of Schroedinger's cat, neither dead nor alive until the box is opened. Thing about that crate is that it was built with a 2x4 stud frame and plywood panels and the lid was sealed using a large tube of ATV and a lot of screws. it has to weigh as much as 200 lbs.and its dolly wheels would need to be replaced as they are both flat and frozen. Plus there is the minor detail of a border to circumvent................
Nick