hey man dont worry. I am 16 as well, 132 pounds, but 5 7. Dont be afraid to eat, you might be under eating if your only having 2 meals a day. I have 6 meals a day with about 325 calories each meal (also consuming about 1 gram of protein per body weight each meal), and i have about 7 to 8 percent body fat (meaning my abs show). If you want to bulk up in strenght, and keep your waste line down for your abs, do what i do;Of course eat more, but when you lift go for lower weight, higher reps(i would say about 8 to 10 reps) since you said somthing about wanting to tone. Since you're relativly new to this try this site
Read a little bit through that and see if some of your questions can be answered. Also if you seriouse about bulking up and gaining muscle i would recomend you count your calories on fitday...it's on the site i gave you