farmall f-12

As to getting it started (assuming it's not stuck) thoroughly clean the entire fuel system, change all the fluids, put a fresh set of plugs in it, clean or replace the points in the mag, spin her over with the plugs out to see if the mag is hot, maybe run a compression check and then commence cranking.

You might have better luck pulling it with another tractor until you find all the little bugs.

Starting is tricky, mostly because of the downdraft carb. They'll flood at the drop of a hat. Also, the most commonly used plug is a Champion, D16 I think. They're junk, but I can't find the equivalent Autolite locally. Once you get the starting drill figured out, and use it faithfully, and keep the carb clean and the float adjusted, they'll start fairly reliably. If you flood it, just walk away until it evaporates, or pull it with another tractor. You'll never start a flooded F12 with the crank. BTDT...

BTW, most of them did, indeed, start on gas and run on either kero or "distillate". That's because at the time the kero was much cheaper than gas. Any more, it ain't worth it, and it's a PITA anyway. Kero doesn't make as much power, and if you forget and turn it off with a carb full of kero, you're in for a real treat trying to get it started again. Just use gas all the time, easier and cheaper.