what are the requirements to start your own bakery/ coffee shop ?

I am still in middle school, but I want to start planning early. Things I would like to know are: 1. How much money will I need to get my business off the ground? 2. Do I need to go to college to get this career? 3. If so, what degree(s) will I need to get? 4. When can I legally begin to make this a legitimate business