Are you sure you're the owner?
As far as I know, there was no factory security based on the key until '98 called "PATS". On '98 the security disables the fuel injectors not starter. Starter interrupt wasn't until gen 3, 2002 IIRC.
I suspect you might have an aftermarket alarm and will need to ask the manufacturer or at least identify it. The same is true for the key fob, it is not needed to start the vehicle as it came from the factory so if it is needed it must be a 3rd party keyfob.
Once you identify the 3rd party security system, consult its installation manual and do the reverse to un-install it.
However, it is probably bypassing the starter relay so you could trace the starter relay wiring to see where it breaks it and controls switching, and just reconnect that wire without the security module, which is just the start of what I wrote above, beginning to un-install it.
It would be good for you to remove your email address from your post so it isn't harvested by spam-bots. Turn on email alerts for your profile and this topic and then you should get email notifications when people post replies.