@hunterguy92 1st off, !
If you are "mechanically inclined" you are fine. Just make sure the engine sounds good for the $$ the seller is asking. The Kohler engines are very good engines, AND are easily rebuilt with readily available parts. Watch for the hub set screw NOT being tight and the hub not being tight on the axle. Some folks don't keep an out for this type of (possible) problem. You will be able to see right away if this machine has been well cared for.
Red Square, EBay, Craigslist and other marketplace sales are good sources for parts for the tractor itself, and of course the "Big Show" in June!