First lesson: Land Cruiser is two words. :ylsmoke:
Second lesson: You can't adjust the lifters, they're solid. You can adjust the tappets on the valve rockers however, which does need doing every now and then as a maintenance item.
The '91 has the venerable 3FE engine, the penultimate development of the original F-series engines. They make a lot of torque at low rpm's so they are a great wheeling/off-road engine but they are underpowered for a truck the size of an FJ80 (originally designed for the 40-series) on modern highways. It will do freeway speeds, though not necessarily uphill. Properly maintained they are good for 2-3X the current mileage of that one easily. The A440F automatic transmission these all came with (in the U.S.) is also legendary for it's over-built strength (and weight!). Like all F-series engine Land Cruisers, the fuel economy is less than stellar - 11-13 mpg.
The short story is, '91-92 FJ80's are great off-road trucks, but if you need this one for a daily driver/commuter/family car, you'd be way better of with the '93 and up FZJ80 which is more tuned for the road and makes much more power at highway speed.
Water in the door is a common occurrence with these trucks. The drain slots in the bottoms of the doors become clogged easily and the fill up with rain water. The fix is easy - open the door(s) and poke a thin screwdriver up through the several drain slots and get a stream of old water all over your hand (and face if you're not careful
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).
the price sounds not bad to me for that low of miles and no rust. One of my sons recently sold my old '91 FJ80 with no rust and almost 300,000 miles for about $2,000. It was still running great, had never had any major work (new alternator and new radiator in all that time), and the head has never been off. I would drive that truck across the country tomorrow without a second thought. One of my favorite Cruisers ever; I was sad to see it go.