engine stalling and power loss

Is the check ingine light on when the engine is running? If so, it has trouble codes stored which sould be very valuable for diagnosing your problem. there could be a crankshaft or camshaft position sensor malfunction which could cause the problem. find a mechanic with a scannner to read the codes and go from there. Here's a directory link for you: http://repairpal.com/toyota-repair-in-leland-north-carolina