You could always try to just hard wire the ecu.
don't know the car well enough to tell you how to do it, but that could be an option.
I'd start with replacing the ignition switch. There are things in the car that should power on regardless of the ecu.
Also, are you sure the battery has a good charge? If it is too low, things won't kick on the way they should.
As for the coil, it should always have 12v. the ecu controls it by grounding it out. Some cars have a switched 12v that is controlled by a relay. So that could explain why you are getting power to the coil.
Replace the ignition switch. That could solve all of the problems.