Toyota Repair Problems? Ask a Mechanic for Answers ASAP
At this mileage, the engine will last that long as it is a good one. The transmission's in these are also good but as with everything else, things do just tend to wear out. Transmissions have clutch packs in them much like brake pad material. I wouldn't expect it to last the whole next 100,000 without some sort of issue but you may get lucky with baby-ing it and proper fluid replacement.
Other than that, I would say that they are very solid vehicles and should give you plenty of worry free driving.
Please ask more of me if needed.