You asked what you should be lifting, everything.
You can't focus on any one area and expect fat to just drop off that spot and be perfect. Ever see a guy with 6 pack abs and saggy man boobs, I doubt it. Fat comes off everywhere evenly (even though it doesn't go on evenly). I suggest working out your total body, doing things like squats, leg lifts, pull-ups, push-ups, etc. If you have weights great do stuff like curls, overhead presses, tricep overhead lifts etc.
If you want to work out and don't know what to do, I suggest going out and picking up a couple copies of Muscle and Fitness or even MuscleMag, I sugges M&F more though. Every month those magazines have articles on dieting, supplements, and workout routines. MuscleMag is geared more towards the hardcore body builder so at first that one won't have as much use for you. Also the internet is your friend, if you are limited on what weights you have and don't want to pay for a gym try looking up something called prision work outs (think things you could do if you were locked in a cell alone with no weights to stay in shape...nothing to do about not being raped). Also your local book store has a huge section of fitness books, many of which will have good routines in them. Flip though them in the store to see if they are what you want, if they are all stuff to do at a gym and you know your not going to do that then don't waste your money.
I also have found it's super helpful to keep a food log. This is a journal that you write down exctally what you ate, when, how much etc. It can be as simple as: 1pm cheese burger and a coke, or can be as complicated as you want ie: 1pm, cheese burger, and coke 30g protein, 26g carbs, 18g sugar, 350mg sodium etc. You never really relize how much you eat (or don't eat) until you force your self to write everything down, and I mean everything, if it goes in your mouth write it down.
Also plan your workouts, again I use a log for this one as well. It saves time at the gym (or your garage or where ever you work out) I know when I go to the gym "ok today I am doing biceps and triceps", I open my book and it says, "bicep curls 4 sets 10 reps 40lbs each arm" next it says "preacher curls 3 sets 6 reps 140lbs" etc. That way I don't have to try to decide what to do when I am there, trust me if you do it that way you will waste a lot of time and end up only doing the things you like doing, which of course means the easy stuff. Plus the log helps you keep track of your progress. If you are doing push-ups and you just plan to do 3 sets to failure write down how many you do, next time, aim for more. It helps set goals and achieve them.
