It's not possible to answer this without knowing what type of cookies/how many of them/what size etc... you wish to bake.
For most cookies you can't use oil in place of shortening.
Yes. Margarine is basically solidified vegetable oil, so you should be able to substitute it in a cookie recipe without a problem.
You can replace shortening with applesauce during baking, but this will give your baked items a difference consistency. For example, cookies turn out softer and more cake-y when using this substitution.
Yep, vegetable oil is always the best to use when you are baking.
Definitely. Much better for you, too.
Oils that are suggested for use in baking are Butter, Canola Oil, Corn Oil, Lard, Margarine (hard & soft), another oil used for commercial baking is Coconut oil. *Safflower oil can be used if the end result taste is to your liking. I use exclusively Olive Oil for all my baking when oil is called for . The taste of Olive oil is slightly different when one is used to Canola or Corn, but good.
no
yes yes u have to have vegetable oil to make cookies
No but you can make American muffens with vegetable oil
Yes. Yes you can.
that is stupid. No u can't ^^ actually YOU'RE stupid, yes you can.
Vegetable Oil helps saute the food and cook it faster, it also help rising in the baking process