My alarm is very faint, my dome light will turn on when I open my door, and when I turn the key in the ignition, the dash lights all light on and there is a continuous clicking noise in the engine. What could be wrong?

Sounds like your battery is dead. There is not enough current remaining to spin the starter motor. The clicking sound is the starter relay engaging. You can try charging the battery, but most likely, if the battery is original to the car, it will need to be replaced due to age (it is about 5 years old).