2011 Dodge Caliber

I have a 2011 Dodge caliber I bought a few months back with a 168,000 miles . Just put brand new battery in, all lights work. Heat and air conditioning works. Everything that is power works. I did install an aftermarket TV screen and backup camera. It does have a slight exhaust leak which doesn’t cause the car to be super loud but enough to where you can hear it. The check engine light does come on , not sure why it hasn’t really affected the way the car runs and drives, probably could use a tune up .Small rust spot under driver side door. Rear struts could possibly need done, I only say that because there is a slight knock when you hit a bump other than that the car runs and drives pretty well. Understand I would keep this car but I have to big of a family I need something bigger looking for third row seating. Daily driver so miles will go up