Hi at,
Contrary to popular belief fueled by informercials it's not possible to target fat around a specific area such as abs and your thighs.
If you are determined to lose fat you must combine cardio, strength and proper nutrition so that your body can burn fat.
When it comes to your diet, It's really simple, weight loss is mathematics. Your body must burn more calories than you consume. To calculate the ideal number of calories go to the link http://www.foodfit.com/tools/w8calc/default.asp and try to stick to this number of calories.
Once again, you must do cardio and incorporate strength training specially working out the legs. The 2 best exercises are squats and lunges. Strength training allows you to build more muscle mass as this will enable your body to be an efficient fat burning machine. Go to http://www.aarpfitness.com/personal_training_online_trainer.aspx and check out the leg exercises including how to perform squat and lunges. Remember Diet + Cardio + Strength is what you need.
Keep us updated, you can also include before and after pictures. All the best!
Health and Happiness
Kenn Kihiu
http://www.danceXfitness.com