what exercises help tone butt and tummy and get rid of cellulite?

I'm am fairly thin already i would just like a nice smooth look instead of the belly pouch and i would really liked toned legs, arms and perhaps my bottom to even have a little lift, i've also noticed small dimples on the back of my legs.. well i've had them for years and i'd like them to go away. i'm starting at a gym here soon and i'd really love to get some ideas on what to do when i get in there besides just running... any ideas... thanks!