A:AnswerI have a 2015 Tundra with key. It worked fine. I did have to buy a vehicle specific harness (also from Compustar). BestBuy website has a compatibility check to see if this will work on your vehicle. Just need to enter what kind you have. I would suggest to let them install it. Mine was a bundle that included the install and harness.
A:AnswerI have a 2015 Tundra. On mine, I can use the original key fob, the one that came with the car. I press "Lock" 3 times to start and also to stop the remote start. I think you are asking "Does it need to be near the car for driving?" No. Only to start and stop. It works like your door locks.