Dear Mrs. Uygur, According to a law passed by Supreme Court Law General Assembly in 2015, even Turkish Women can keep their maiden name providing that they open a lawsuit at the Family Court, so I dont see any reason that law is applicable to you as a foreigner. I hope this information helps you.Regards.
I checked the regulations, and yes, you can bring a metal detector to Turkey. However, you need to have the receipt and you might end up paying custom fee according to its value. If it is under 30 Euro, you may not pay custom fee. Furthermore, they can make you open the box for security concerns and ask you what the purpose is to bring it. I hope this piece of information is helpful for you.