The flywheel is bolted to the back of the crankshaft, so yes, it's at the very back of the engine. The torque converter (part of the transmission) is attached to the flywheel.
BTW, the flywheel teeth mentioned are also what the starter turns to get the engine started.
And the bellhousing is the metal case surrounding the flywheel and the torque converter (if you had a manual tranny, this is where the clutch would be).
Hope that helps somewhat...good luck!