You sir, are obviously a classic underachiever :) It appears as though you've been peeling away some of the outer layers to see just how bad things are, and you are a brave soul indeed if what you have seen so far does not make you flinch.
I'd most most concerned at this point with the structural soundness of the framing - the rot evidenced in the pictures likely goes well beyond what you can see. The one image in particular that concerns me is where the jack is attached to the midpoint of the camper body. Either there was an impact of some sort or the framing is so spongy that it can no longer support the weight of the unit.
I don't want to discourage you from trying to make this vintage TC something you can use, but please be realistic about the extent of the damage.
Good luck.
