Pto has drag sometimes and spins if lubed good. Careflly try to grab the shaft lightly with a gloved hand and see if you can stop it. If a female end you would need a shaft to put into it. Don't grab hard if it won't stop easy! Maybe it should have a brake on it that is not touching??
The three points at most farm stores seem to be for Old Ford N's and are pretty long. I have made my own arms by buying the end ball sockets and using thick flat stock for the main arms. You mention "Yokes". That mean that it DID have lift and just parts missing? Some tractors have mount tabs right on axle castings for the arms, some have pins on body or holes for pins or rods to hold. Not familiar with what they used. The lift links are the harder peices to make if you want adjustable ones. Look at the manuals for your tractor model and hitch as linked above and study them to get better idea what is needed.
If this is KT17 engine, a twin, make sure to use good oil like Rotella in it, they are known to have rod breakage on early models. Don't drive on hills sideways, the oil doesn't circulate well in them. IF you have oil filter, your have better model with pressure.