How about medical assistance if I need any?
First thing you should know is: Doctors and Hospitals in Turkey are really good, and there is a solid Medical infrastructure in Turkey.
This said, it is strongly recommended for you (and your family) to have a solid insurance issued in your country, covering other countries, and naturally Turkey as well.
If you don’t have any health insurance, no worries, you can easily get one in Turkey from a specialized private insurance company.
No insurance doesn’t mean that you will be deprived of health assistance if anything happens, but will need to pay it in cash, and that will be costly should you go to a private hospital.