As a Turkish passport holder planning to visit Vatican City, you will require a Schengen visa, which allows a stay of up to 90 days within a 180-day period and typically costs around €80. Given Vatican City's unique status as an independent city-state within Rome, Italy, common flight routes will likely route through major Italian airports like Fiumicino (FCO) before connecting via train or taxi to the heart of Rome and then the Vatican. Understanding Italian currency, the Euro, will be essential for your expenses, and considering travel outside of peak summer months will offer a more serene experience of this historically rich enclave.