Assuming your referring to PATS vehicle security....
The transponder & reciever are built into the ignition keys and steering column. The vehicle wont start without those two components pairing first.
For remote start systems, you will need a transponder (PATS) bypass module connected to the remote start system for the remote to be able to start the vehicle without the transponder key.
Those bypass modules sell for about $40 to $50 USD. >>
here's << a sample.