Not exactly sure about the 2010 Renegade. If I had to guess they are for the evic controls, and I know the black part near the bottom of the wheel is cruise control. Anyways, I personally think that Renegade is overpriced. They're basically asking $20 for a 4 year old truck. Sure it's a Jeep, but the Libertys don't hold their value nearly as well as a Wrangler. They could probably get talked down on that though.
You mention the wheels, you don't like the 16s? Want to go bigger or smaller?
2011 KK - Skyslider - JBA Adjust-A-Strut - OME 731 - Bilstein Shocks - JBA UCA- 245/75-16 Duratracs