Trouble code P0820 means:Gear lever X-Y position sensor circuit
Trouble code P1135 means: Air-Fuel Sensor Heater Circuit Response Malfunction
clear diagnostics codes for Toyota . like most cars just disconnect the hot cable on the battery, that usually works on most cars
www.toyotacelicaonline.com/error.htm
Trouble code P0755 means: A/T Shift Solenoid 'B' Malfunction (Mechanical)