I don't want to sound like a smartass but, the instructions on how to reset the light(which is really an oil change reminder) are located in your owners manual.
disconnect the battery
Depends on which light you are referring to. The "Check Engine" light comes on when there is a problem with the emissions system. The "Maintenance Required Light" comes on when scheduled maintenance is required as outlined in your owners manual.
To reset the maintenance required light in a 2007 Toyota, first, turn the ignition switch to the "OFF" position. Then, press and hold the trip meter reset button while turning the ignition to the "ON" position (do not start the engine). Continue holding the button until the maintenance light flashes and then turns off. Release the button, and the light should be reset.
The 2007 Toyota Yaris has 16 valves.
The 2007 Toyota Yaris is a gas-powered vehicle.
The 2007 Toyota Yaris has a 5-speed manual.
The 2007 Toyota Yaris has an inline 4 engine.
The 2007 Toyota Yaris has a drag coefficient of .29 Cd.
The 2007 Toyota Yaris's turning circle is 32.6 ft..
The 2007 Toyota Yaris runs on regular unleaded.
The curb weight of the 2007 Toyota Yaris is 2293 lbs..
The 2007 Toyota Yaris has double overhead cam (DOHC).