Tools you will need are basic screwdrivers, and a basic ratchet set. Very simple stuff. It will take about 10 minutes to remove all of the panels to get access to the radio.
Also you will need a soldering iron, solder, heatshrink tubing if you want to solder everything together.
If you want to crimp everything together you will just need butt connectors and crimpers.
You will need the steering wheel adapter kit if you have steering wheels controls, The correct wiring adapter (JBL or non JBL) and you will need the dash trim kit.
If you want to watch DVDs while driving, you will need a parking brake relay as well.
Here is the guide I used for removing the radio. It was very easy.
http://www.castulucci.com/projects/carpc/oemnaviaccess/