I really enjoy cooking. Grilling, oven cooking, stoves - I love it all. Do you cook much?
I can't cook alot at all! What is the easiest way to cook stove, oven or grilling?
Using an oven is pretty easy if you have instructions. Grilling can cook meat and veggies quickly, but it requires a lot of attention.
I am recently trying to eat healthier, is one of them healthier for you?
I would say grilling is good because you're usually cooking lean meat or veggies. When I use my oven, I typically use it for baking sweets!
Can you buy premade grill kits of food? 
I haven't seen any, but they might be out there. You're generally just applying dry heat from above or below the food, so you can use it with all kinds of stuff. My fave is chicken.