It's messed up bad and I want help.

Sometimes you have to plug and unplug several times to get it to recognize the device 3 times plug count to 3 unplug count to 3 and plug in it should start to charge, if not you could have a bad brand new battery.

The neutral light switch (down at the transmission) could have gone bad.

What is the model number of the unit?

Look to see if the check engine light come on, on your dashboard, when you turn the ignition on. If that light does not come on, then your ecu computer is in need of repair and your jeep will not start until that light does come on.
Alternately, if that check engine light is on, then it could be your crank sensor that's bad on the jeep.

I was wondering if it broke before you changed it. Even if you was one tooth off it still should have started at least and maybe not run too good which will not hurt the engine. You could be 180* off on the timing. If you like you can register your car at autozone.com and it is all for free and there you can access any repair diagrams. Great tool for future repairs.

You need to make sure this is the right size. Ask your local auto parts store if you have the right size. Here is a link: http://www.ehow.com/video_110_replace-spark-plugs.html

i found this happening to me and i oiled (light oil like 3 in 1) the driver (hammer) in the tip. that way it could retract and drive the next brad.

try holding down the front power button for about 8 seconds, it should beep 3 times and start up in Standard Video mode. ensure you have the composite out plugged in instead of HDMI. inserting the HDMI cable when in standard mode should make the system recognize it and offer to switch to HD mode.

The laser is starting to go bad in your dvd drive. You can either replace the laser if you know how to open up the dvd drive, or just replace the whole drive. You can get them off of Ebay.

Definitely sounds like a starter. When a bad starter is cold, it will start the car. After riding around for a while or after several starts in a row, the starter heats up and won't start without a boost. Since you've ruled out the battery and alternator, I'm positive a new starter will solve your problem. Good Luck!