Buy a Toyota!
Seriously, get a carfax, and log on to toyota.com/owners and enter the VIN for the service history. Anything done at a Toyota dealer in the last 7 or 8 years should be listed, including mileage. Be sure and do both - I bought a 98 (with a lot of mile so it didn't really matter) and the carfax showed no wrecks but the dealer history showed extensive damage (including straightening the frame). Usually a shop will do an inspection for $50-100, cheap compared to buying something with serious problems, though there are just a few typical things these need. Timing belt and water pump every 90K, ball joints every 100K or so, check for 'pink milkshake' (transmission cooler/radiator breach). See the 'sticky' on 'stickies' for the buyer's guide.