did you loose the only key to your car? if so then you will have to have it towed to the dealership or call a locksmith.
otherwise i would pick up a new/uncut key on ebay for 20 bucks (dealer wants $45, i asked them last time i was there) then they will charge $50 for labor to cut and program the key.
seems pretty retarded if you ask me charging 50 bucks for 5 minutes worth of work...but if you need another key....they can rape you like that.