After eating or before?

It´s not good to exercise with an empty stomach...always eat something before (slice of bread, banana, etc..) and drink plenty of water.

After the exercise, food that has good amount of protein will suit you well.

depends how much.
Full meal - before, so you can gain back all the nutrients you may have lost during your workout
Granola bar or so - Before so you can have energy for your workout.

Eat before exercising. If its a small meal, eat 1 hour before. Medium meal - 2 hours. Larger, 2:30 or 3 hours.

exersise after u eat

Both. Make sure you give yourself enough time to digest your food before you work out, but you should also make sure to at least have something small after you finish your workout. Preferably something with protein and calcium

Well eating with a full stomach is a horrible idea. Your asking to throw up. I'd go with before eating, but have a bit of food in your stomach.

You don't want to work out on an empty stomach, but also not on a full stomach. It depends what kind of exercise. If it's pumping weights, then you should have a small-moderate meal about 1-2 hours beforehand, then after the workout, have a protein or mass-gainer shake, and a decent sized meal which is rich in complex carbs, protein and fatty acids. I'm not sure what the consensus is with cardio exercises.

After and before.