Really old tractors are cool, but you have to careful with them, they have no "save me from myself" safety features
if you start it in gear, its gonna go, same with pto, some of the older machine the PTO implement may have enough inertia it can push the machine if shut down and not allowed to spool down before dismounting (bush hogs can do this) not saying tis to scare you away, but more to inform, you're not familiar with the equipment ( nor am I ) there are a lot of things to consider and be mindful of.
that said, with its work out clothes on,
mowing trim
if you have a lot of smaller trees, or shrubs, this isn't the type of machine you want to mow with, you're better off with a ZTR or lawn tractor, if you want/need a loader, you'll be getting a ROPS ( roll over protection) as well, the loader can cause instability when raised loaded or unloaded depending on terrain. if you get a loader, also get 4wd, it helps a lot, you can always not use it, but damn sure nice to have if you do need it ! 4wd is also nice to have using box blade
another thing to be mindful of, old machines need repairs, and other consumable parts like tires. the front tires on mine have been discontinued, as have the rears, on a 4wd machine, just tossing on any ole tire can get real expensive. after some careful tire selection for the front I came "close" to what it had, and use air pressure to account for the rest. they're slightly under inflated to decrease roll out slightly. I don't drive in 4wd for extended periods, just where needed and only in loose conditions where tire spin is expected. Rear tires are on the horizon, just need to pony up ($$$)
diesel is the way to go, can be more expensive to repair but generally run longer and have better power.
the older gas machines work fine, but with the hours you'll use the machine, todays gas will kill a carburetor with fuel going to shit before you realize it. part of the reason i went to diesel, i got tired of having to rebuild a carb every couple weeks on my old gas lawn jockeys
i keep Seafoam on hand and pour some in every tank full, had few issues since. change oil every other year ( i put maybe 25 hrs a year on it ) blow it out and grease every third mowing. check fluids before using it every time.
no, mine is not for sale (it was at one time) this is the best tool i never knew i needed till I got it, and i'm quite happy with it.