Most important: What you at (in general eat less, less carbs, less bad fat, more protein, veggies and salad)
The rest: Workout. Everything that gains muscles on your legs and upper body, abs workouts to tone your body. You have to burn your fat, do cardio, HIT, HIIT and tabata
How tall are you? What is your weight? Do you know how much fat (%) you have? What's your abdominal girth?