when you install that security system you will be splicing into power at your main harness near the steering wheel. Grab the power from there also. I use www.the12volt.com
for wire colors and they have great writeups for people who arent that experienced with alarm system installs. The TJ is very easy to work on, the alarm is one of the easier pieces of electronics to add. Proper prep is the key. bench prep the alarm before the install, this means roll up all the wires that you arent using before you start connecting the alarm to your Jeep. When you get your alarm you will see loads of wires, you can reduce this to about 8-10 wires cause most of the wires arent needed for a TJ install. This will keep the work area nice and clean and way less confusing. If you want more help after you get the alarm just post up here.