Toyota Tacomas are ultra-reliable trucks, but one serious issue that has plagued them is rusty frames. When I say 'rusty' I mean rusty, with frames literally falling apart and collapsing. You can see photos of the damage on the TTORA.com board if you are worried about your frame and to read other people's experiences with getting their frames fixed and their trucks bought back.
Dealer Communication Letter (From Toyota Corp to all Dealers)
Warranty Policy Bulletin #POL08-03 (Details about what is covered and VIN ranges)
Vehicle Inspection Procedure
Images courtesy of Fast1 on TTORA.com; his truck had is being bought back by Toyota due to the condition of the frame.