Depending on what country you are from, you will need to contact the local turkish embassy to obtain information regarding a working visa.
I believe that you can open your own business in Turkey, but the correct procedures have to be followed, as there are so many rules & regulations.
I know there is a private school in Kusadasi that some British children attend.
Sorry i can't be of any more help. The embassy or Turkish Consulate is your best bet to get the answers that you need.
Claire
