Firstly welcome to Flyertalk and the TK M&S forum!
I've never done these connections, but I guess you are talking about:
TK10-->TK788: 1:00hrs connection time. This is the Minimum Connection Time (MCT) for IST and TK788 is the last flight out to TLV. If you miss it, they would probably put you on the red eye flight departing 1am and arriving TLV at 3am. How much of a tragedy this would be depends on your plans the next day ...
TK1044-->TK9: 1:05hrs connection time. Again very close to the MCT. However, here you have an earlier flight from OTP to IST (TK1042) which should be safe.