According to John Howell's book "Buying a Property in Turkey", non-Turkish citizens are not allowed to work as:
itinerant salesmen, musicians, photographers, barbers, typesetters, clothing & shoe manufacturers, stockbrokers, sellers of state monopoly products, interpreters, tourist guides, transport workers, in construction iron and wood industry, working on water heating & lighting installations, loading & unloading sites, driver, day labourer, watchman, janitor, waiter, household help, singer, entertainer, vet, and most jobs in medicine, dentistry, pharmacy, nursing, law or work as a notary public.!!
Work permits & work visas are very difficult to get as the employer has to give good reason why he is employing a foreigner and not a Turkish citizen. Starting your own business is also difficult as (amongst other things) you have to prove that your investment will provide employment for Turkish nationals and not have any adverse effect on local Turkish run companies.
You might be ok with teaching English Kaytee, as long as you have the qualifications.
If only they were in EU it would be so much easier to work there!