timing belt/other maintenance
With that kind of mileage should have had perhaps 2 timing belt changes by now and the water pump is generally done at the same time.
Ask to see the maintenance records-look for frequency of oil changes and documentation of same. Rear axle seals are another problem area on these 3rd gens.-look for oily residue on the inside of the rear drums-climb underneath or ask to have it inspected on a lift.
Take it to a certified Toyota shop and use their suggestions for repairs as a bargaining tool to negotiate price.