Hi, you don't need a visa for Turkey. And the money is just to ensure that you have enough for your daily expenses. It is generally around 60 euros a day if your hotel bookings are done in advance, and 120 euros a day if stay is not pre-booked. Also, you can book hostels to save money on stay and keep your balance a little high. So, 50000 should be enough but please confirm from VFS Global centre in Delhi.