There should be 3 or 4 "quick reference" guides in a small pocket under the passenger side dash. The guys in Dallas can fix you up with the rest - there is even a supplement booklet for the 616hp update. That's the 1st thing I would do is get it over to McD's (couldn't help it) and have them go thru the car, serviced a month ago or not - car may still have factory warranty, you may want issues logged like paint, etc. quickly before it expires. Holding the unlock button for 4 seconds will pop the passenger door. I think the missing key is BS - I'm sure someone kept it as a souvenir. I'd try to force the dealer to provide you a replacement or credit you the amount - I'd be a bit concerned that there is a key floating around for your car, especially since it appears to be a local car to TX - probably nothing to worry about but with the key anyone can.....