Go to a small engine dealer or repair shop .
You probably blew a belt.
It might be the bearings are shot in your jack shaft.
Without looking at the setup it's hard to tell. The mower chute and the bag inlet should be right on as a mismatch would cause clogs. It should be too tough to rig a hook and loop to hang the bag.
That would be 0.010" but a business card will suffice as as a substitute, as a matchbook could, also.
It would probably be 2002-2004
Depends on the size of the lawn mostly. A push mower (or better yet a powered drive push mower) would have the best control in rough terrain, but if it is a large lawn a riding mower is better.
Depending on the engine brand and model, it would be 1 1/2 to just over 2 qts.
You have probably broken the drive belt. With the mower turned off, lie on the ground and look underneath the mower. There is a deck belt and a drive belt. The drive belt is the upper belt. Grab the upper belt and see if it is broken.
The best riding mower for hilly terrain is would be any kind of walk behind mower as you control it's movements, speed, and direction. However, if you have a large yard and want a riding mower newer LG mowers a good bet. An older option would be a Gravely Garden Tractor.
likely a bad engine.
in my opinon, a lawn mower (riding, preferably) will do
I would guess that it is actually a Poulan. They are marketed under their name and I believe most or all Sears Craftsman riding mowers are actually manufactured by them.