Remote starters. if you arent good with electrical and comfortable in that aspect, they can be a headache. To find out if you need a bypass is to look at your key.
If the top of your key is black, you wont need a bypass.
If the top is grey, you have a chip and will need a bypass that will learn the code or to give up a key.
2004 Jeep, compustar, jdlpk
That page will give you all the wiring info you need, you have to go into the doors for lock and lock, but i think there is a way around that, havent done an older cherokee in a few months for a remote start.
Flashlogic - FLCAN
Is the info for the bypass. You will also need a special tool to program the bypass with the proper firmware.