Orkun, your english is fine. It sounds like you are doing fine, but would like to build more muscle and lose fat from your body. I believe most people think that food before your exercise gives you energy for the exercise and food after your exercise helps you recover and build muscle. Carbs help with energy, but building muscle requires protein, so make sure you have protein after exercise.
I am also a big believer that the way to lose weight/body fat is through diet, although exercise helps, the biggest effect is from diet. I have had great success with a low carb diet and intermittent fasting (http://en.wikipedia.org/wiki/Intermittent_fasting).