Yes
yes
It really depends on how the alarm is wired into the car. If it is wired into the ignition system the yes it will keep the car from starting if triggered.
yes and ignition relay would..
A fuel pump relay switch can cause your car to stall after starting. A malfunctioning fuel pump relay switch can cause your car to not start at all.
Push it
battery, solenoid/starter or relay or even ignition switch
You need a new ignition cylinder with a new key with the right resistor.
If the car turns over, gets gas and just will not start try the ignition module. CAR TURNS OVER
Unless your car is a diesel, they can certainly keep your car from starting if they're missing. They can also become fouled or badly worn, which, again, could keep your car from starting.
varies by car, give me make model and year and i can get more precise
IGN stands for ignition. DAB I do not know.
Remove the fuel pump relay or the fuel pump fuse.