Help with remote start and lock

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I recently got a 1981 280ZX Datsun. The car runs well and I love it, though I wanted to make some upgrades/mods to it, specifically the start and locks of the car. I essentially want to have remote locking and starting of a car. I have found very few kits that do both, most kits either lock or start with the remote. I could have two remotes but that doesn't seem logical to me. I'm very new to the realm of cars and especially electronic work on cars however, I do have friends that are willing to help me with this stuff, any suggestions on how I can incorporate both of them into 1 remote? Thank you