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If there is no spark at all, the problem likely lies in primary circuit of the ignition system. Check the following:-
- Battery health.
- Ignition fuse located in under the dash, finish panel on driver's side.
- Ignition distributor assembly. (Ignition module, ignition coil)
- Ignition switch assembly.
- Security system, if any.
If the immobilizer is indeed your problem, there is now way to "bypass" this sytem. The immobilizer system has to read a frequency produced in your key to allow the veh to start. It is a theft deterent. If it could simply be "bypassed", the system would be useless as anyone could start the veh. Ususally, immobilizers kill the fuel supply, not the ignition spark. If you have no spark, you may hve another problem all together.
Ok ,Is there red LED lite in the car for the alarm system? if it's an after market alarm there could be a bypass switch under the drivers panel that you could of hit accidently that would put the system into a valet mode . this switch would put the system into a door lock and unlock mode only. So look under the driver's dash or side kick panel for a switch or button, you would need the car on to switch it back
Did what in a tuneup? If done yourself, are you sure everything is connected correctly? Spark plug leads?
Was it running OK before the tuneup?
Was the throttle/ throttle body touched at all?
Carbon can build up in the throttle body of the Corolla, which (will/ may) eventually interfere with the throttle butterfly seating properly. Too much air is available at idle, can cause rough running.
If the idle bypass air was "adjusted" at tuneup, maybe it was incorrectly done.
Did anyone change the spark setting?