Vintage YAMAHA RIDING MOWER / garden tractor yard

Yamaha riding mower.  YT5700  This has been sitting in my dry barn for about five years. I bought this at an estate sale and was going to fix it up but that never happened so I am moving it.  These cost over $3000 in 1990, so at one time this was a quality lawn mower, sadly now though, it could use work.  - I cleaned the carburetor, put gas in it and it fired right up and ran nice. *However it did not shut off!* I had to pull the plug wires to make it stop. The throttle sticks in the carburetor, that should be cleaned better or maybe a dab of oil where it rubs?  - The deck looks solid but it does not turn on and I'm not sure the part you need is even available for the deck. (I'm assuming the problem is in the electric clutch).  -The headlights do not turn on but I never tested to see what the problem was so it could just be the bulbs.  - This does move forward and backward and the engine runs nice, it just doesn't cut grass as it is. - It's dusty since I have not tried to clean it off and the plastic air cleaner cover is held on with tape.  A nice collectable for the Yamaha motorcycle enthusiast or anyone who likes these.  ***battery is my father's and does not come with***