My Car Will Not Start. When I Turn The Key I Get Nothing, No Clicking Or Lights, Completely Dead. What Should I Do?

Here I can give you troubleshooting details to start a car. Just visit the following links to know, how to start your car.
How to start a car
Car Start

Check your battery. It is probably dead. It could be the cable post is loose and the alternator has not been charging your battery, and if that is the case you have no amps in your battery. Go to an Advance Auto, or Auto Zone if there is one in your area they will recharge your battery for free, or let you know if it is no good, and you will need to purchase another one.

Your battery is dead, charge or replace it.

You need to try an jump start it if that works have your battery checked