Try working out without eating beforehand and see how you feel. Tired? Hungry? If so, you probably need to eat before your work out. If you feel okay, you'll probably be okay waiting until afterwards.
Personally, I feel sick to my stomach if I eat that early in the morning, but I get tired easily during my workout if I don't eat! It took me a while, but eventually I figured out that dry toast or saltine crackers don't make me feel sick, but give me the energy I need to get through the work out.
Afterwards, make sure you eat something with complex carbs and plenty of protien. I like egg whites, oatmeal, or a smoothie. Don't forget plenty of water (and for me, COFFEE!!!!)