You need to start hitting the gym at least three days a week. Start doing a good amount of running also. If you want to tone down, you need to start doing high reps (15-25). This will slim you down and give you more lean muscle. Also, you need to give up fast food and cut fatty foods out of your diet. Eat more vegetables and fruit. It will take time, but the more sincere and persistant you are, the faster you will lose weight and become more "cut".