The light work on the jeep the horn works, I put the vechicle in park turn the key and it wont start, The the key is turn it make a clicking sound

This sounds like a low battery problem ... the horn and lights do not take much energy to turn on, but starting the engine takes a lot of power. Try jumping the Jeep with another car, or a battery jump pack (available at any auto-parts store). If the engine kicks over and starts, then leave your Jeep running in park for about 15 minutes. After 15 minutes of running, turn the Jeep off and then try to start it again with no jump -- if it starts, you had a low battery, but the issue is probably solved (running the engine recharges the battery). If, after you have had the car running for 15 minutes and turn it off, it does not start on its own, you probably need a new battery (and you should have your electrical system checked as you might have a bad alternator that is not charging your battery). Sears Auto Canter has a great piece of equipment that can test your battery, and your entire electrical system (including the alternator) in just a few minutes. I recommend that you take your Jeep to a Sears Auto Center and have it checked, whether or not the jump worked because their system can make sure that there is not a slow drain on the battery (due to a loose connection or something like that) which would cause you to have the same problem again.