I am an Indian Passport Holder and have obtained E-visa for Turkey. Upon arrival in Turkey, will the Immigration authorities in Istanbul, stamp/ paste another Visa on Arrival on my Passport? If yes, then how many pages in Passport are required to be free?
The e-Visa is fully electronic - there is nothing put in your passport at all for the visa.
Upon entering and exiting the country your passport will be stamped with a standard entry/exit stamp which will require only a small amount of space.
(Based on obtaining multiple Turkish e-visas, the most recent 3 weeks ago which has already been used to enter Turkey twice)