Cavtrooper1,
Welcome to the Forum!
The oil drain plug is located pretty much underneath the oil filter on the underside of the engine, behind the left front tire (as your sitting on the tractor). You'll have to feel around for it, and have something to
catch the oil, as it will drop right onto the deck. The engine uses 10W30 oil and holds about 1.9 quarts.
There are links in other threads for oils filters....
Rattosh51
Rattosh51
YT6800