Taxes in Turkey
If you reside less than 183 days in Turkey you are considered to be a non-resident which means that you are not fully taxable. You will have to pay some Turkish taxes, though. For example, you have to pay transfer tax. But you can split these costs with the vendor. You will also have to pay income tax on your Tukish income from, for example, renting out your second home in Turkey. Then there are the municipal taxes (rates, environmental tax et cetera).
You are the one who is responsible for filing taxes in Turkey. You will not receive a notice from the Turkish authorities, but you are expected to pay your taxes in time.
You need a Turkish fiscal number (vergi numarasi) when you buy a second home in Turkey. You are going to need this number when you want to open a Turkish bank account.