2000 4Runner Sport (factory keyless entry or alarm)

[superduc]

I just purchased on off lease 4Runner. First things, first. I am very happy with the purchase. However, being that it wasn't from the dealer, there was no keyless entry system that was given with the keys. The place where I bought it from says it didn't come with one when they received it. So, I have been debating whether or not to get an aftermarket alarm. I tried to call the dealer to see if the vehicle had a previous factory alarm or keyless entry system and they said that I would just have to take it in. When I went in to inquire, they said that there would probably be some charge to take a look at it. I can't get myself to pay for the dealer to unscrew the four bolts under the steering column. I checked to see if there was some sort of brain under there and there wasn't. Is there some other place I should be looking or is the factory alarm or keyless entry embedded within the electronic stuff. Another thing that raises my suspicion that there was a previous alarm or keyless entry is that upon delivery of the vehicle I did not receive the original master key (with black rubber) and I only received the spares. I swear there had to of been a previous system. Any ideas on what to look for? I would very much appreciate it.