Hi, and welcome.
It depends on the TV:
HD televisions should be fine - both countries use the DVB-T transmission system, although I'm not sure how widely digital TV's available in Turkey.
For multi-standard conventional TVs, you'll need to switch from PAL-I (the UK system) to PAL-B (Turkey's system). There should be an option to do this in the setup menu somewhere.
Single-standard conventional TVs won't work at all - PAL-I channels are in the UHF frequency band, PAL-B uses the VHF band, so you won't even get a picture.
Hope that helps. Good luck with the move!