How do I survive this?

Hint 1 of 8:

Duck down by the car door.

Hint 2 of 8:

Get the shot gun from the trunk of your car

Hint 3 of 8:

by clicking twice toward the rear of the car.

Hint 4 of 8:

Open the trunk with the car keys.

Hint 5 of 8:

Unlock the shot gun with the keys.