You should not be on a diet being so young. You can harm your growth if you have a poor enough diet. You need to be eating a balanced healthy meal. Do some cals if you want to tone up, but no weight training.
Carbs are found in bread, pasta, rice, crackers, fruit, veggies, peanut butter, etc... Almost everything has carbs. Look at the food labels on what you are eating. In case you didn't know carbs are carbohydrates.