If it is a hybrid with the 4.1 loading file you will have to disconnect the ground cable from the battery for five minutes to clear the flash memory. You will lose the radio and seat presets.
Try removing the the disk then the battery ground cable for 5 minutes and try again. This clears the flash memory. You will have to reset the seat and radio presets.
as to the tail light problem, I had the problem with a 94 Camry. After days of chasing the problem I found 2 broken wires in the flex wiring loom that goes to the trunk lid.
If you are getting spark and gas I would suspect a timing problem. Gas plus spark = combustion. No combustion suggests the piston is in the wrong place at the time of the combustion.
All of the above plus idiots in Jacked up pickups and suv's that ride your bumper with their high beams on blinding everyone for 2 blocks ahead of them. GET YOUR LIGHTS ADJUSTED!!.