Glad your Dad is going to do something with this car. It appears to be factory air too ? Did your parents live near a coast for some time ? That trunk lid has serious rust for a dry climate, BUT he is in an excellent location to find a clean, original, lid to replace it. If the door bottoms, fenders and hood are that affected too, I would be looking for clean, original, parts to replace.
Looking forward to the garage emptying and whole car "unveiling" episode...
