Financial talk

Ok so i have a jeep liberty 2003 sport that has been passed down to me with 59,000 miles so its young still. It has a 3.7l v6 and is pretty much all stock. Im wondering if theres anything that i should do to it. I was looking at a 3inch lift. for 350.00?? http://cgi.ebay.com/ebaymotors/03-05-Jeep-Liberty-3-Lift-Kit-w-REAR-COILS-AND-SHOCKS_W0QQcmdZViewItemQQitemZ230249407206QQsspagenameZRSSQ3aBQ3aSRCHQ3aUSQ3a102 And then i will get some new wheels. Im not going to do any mudding just some trail riding. How about cold air intake or regular intake?? what would improve gas milege the most for the money?? etc. thanks