contacted car seller and he stated car has no immobilizer. this one is double checked then.
i received toyota remote (GREY) from ebay today and just programmed it into ECU. all works, RS3000 properly arms/disarms when using its remote.
i got mislead by ignition key not being recognized by ECU, it was like that because of missing immobilizer module - ECU would flash the status LED if key was equipped with transponder. all works anyways.
for now will leave aftermarket remote starter wires in car (no harm).
I hope this info helps other running into similar trouble, so common when buying cars from private sellers...
I posted similar thread (more detailed) in Solara section of forum. so if mods think this is cross posting and blah blah, you can delete it. here's the link of original thread (I was maintaining 4 threads on 3 forums about my problems LOL):
2000 Solara I4 security device
and here is Solaraguy thread that got me on right tracks as per locating alarm ECU:
http://www.solaraguy.com/viewtopic.php?t=46453
and here is 12volt.com thread that tought me lots of other stuff thank to their resident "teacher"
http://pub9.bravenet.com/forum/stati...&cp=1&cmd=show
Hope it helps all people not willing to let the dealer sort out their problems for tons of green while you can still do it on your own
cheers!