My advice to you is take your time and find bargains in the parts you need. It make take you five years but you will have a piece of family history, and a pretty unique machine.
Diesel is probably not the best penetrating fluid to loosen up stuck cylinders. There are many recipes, but I like brake fluid. Others have their favorites that I hope they"ll share with you. The PTO fix is probably not too bad, as is the sloppy shifter. Fenders will be a problem unless John Saeli has some replacements left. Tires and rims can come from a salvage yard. Look for deals and be patient, it will come together. Good Luck with whatever you decide. Don