Remote start alarms
 

I have a 01 V70 T5. I was looking to put a alarm on it with a remote start option. Car Toys said they could do it but would need a key to leave in the car. Well I only got 1 key when I bought the car and one remote. This is my question can I get a new key from the dealer not programmed for my car then give car toys my old programmed key and then I use the not programmed key to start the car. Would that work ?