When trying to install a car alarm like Scytek galaxy mobile 500 what other things would I need for a Mitsubishi lancer de 2010 ( some guy told me a door lock bypass module) I've heard that they make a keyless ignition bypass which would be great since I don't want to leave an extra key in the car.

Does anyone have experience installing alarms, i am good at audio and video install and mechanic work but never tried alarms any tips to set me on the right road would e great. Thanks