While looking at buying a 3rd gen 4Runner, I have also found that in the province next to me (British Columbia) there are quite a few Land Cruisers Available. Most are 1997, but there are was one from 2000 and another from 2002 (from the sates I assume)

What are the differences between say a 97 4Runner and a 97 TLC?

TLC is longer and wider? How is the ground clearance? IIRC the TLC was available with front AND rear lockers. I would also assume quite a bit worse on gas with a 4.7L engine.

Engine reliability similar? Ease of maintenance?

1988 4Runner, V6 Auto, Mostly Stock
32 x 9.5 Swampers