Well, you have a problem in the ATA circuit , but I can not tell you where from what we have so far..
I would pull the cluster and jumper therminals 1 and 3 at the K38 relay ..this will eliminate the ATA starter lockout and get the car to start as if there was no ATA system.
If you want to diagnoses the Alarm, it will take a schematic and a meter to chase it out. Might be worth it to just not to have the alarm.... as Canadian Versions do.