You don't need any educational credentials, like a degree or certificate. But you do need the essential skills of both running a business (of any kind) and providing the specific product or service(s) your business offers. It doesn't matter whether you get those skills from formal schooling, apprenticeship, former business experience, work or volunteer experience, or self-study - as long as you have them.
It's helpful to have some kind of background in business or have taken a business class so that you can calculate when you will break even, see who owes you money etc etc. If you want to start a business, it REALLY helps if you are qualified in the service your business will be providing. It's best to have lots of retail/shop experience before opening one of your own.
Depends on what you want to start it in. My advice is to go and work in a similar business/shop and learn from the mistakes and good stuff that the people are doing. Then you can do a class in business management as well and accounting as it will help you a lot to manage your business.
most community college has business management courses or can teach you the basics of running a business. You need to at least learn the bookkeeping and accounting skills as well as invoicing and how to do the proper licenses and permits for your city and county
to start your own buisness, you don't need any! cuz it's your own :)