When you turn the key past ON as if you were starting the car the CEL should be off unless the car is throwing a code. At least this is what someone told me, whom is a toyota tech. i've reset the computer after leaving the battery off for a while as well and cranked the car again and the CEL light still stays illuminated.There may or may not be a code stored. The check engine light should come on when you turn the key on. It will stay on until the engine starts up, thats normal. An OBDII scanner is the only way to get the codes out assuming there are any stored. You will need to do some further testing to find out why it wont start. It either doesn't have spark or fuel.