A:AnswerNo, it is not an immobilizer and does not contribute to security in any way. It simply remote starts your vehicle for vehicles not already equipped with this feature.
A:AnswerI got mine installed for free through best buy no added price everything was included harness and all. Might just be your specific vehicle if they are charging extra.
A:AnswerYes. This should be compatible with your Nissan. Check in with your local auto tech center about installation and addition parts you may need in order to do the install.
A:Answeryes. Best Buy sells an upgrade kit for the computer system and will install it for around $50 I believe. I would go to the auto tech bay you had the original install done at and ask them about the drone. They should be able to help you out and get you setup with the drone.
A:AnswerYes. This is compatible with your Toyota. Contact your local auto tech center about installation and getting all parts necessary for installation.