1. I want to gift these properties to my sister, resident of India. Does she or I have to pay, for this gift-transaction, TDS or any Income Tax in India?

2. are uncles, nephew, neices included in relatives definition for any such gift deeds?

NRIs may also be able to transfer funds in excess of the LRS limit, but they will need to obtain prior approval from the RBI and provide the necessary documentation. The specific requirements for obtaining approval and the limits that apply to these transfers will depend on the purpose of the transfer and the type of account involved.

Western Union is a wire money transfer service which allows one to quickly transfer money the world over. One can go to a designated Western Union location and then send money to any location as required. The recipient can collect money at a Western Union location within their area or have cash deposited into a checking account. Basically, it is just an electronic transfer of funds, similar to that of PayPal.
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The fees to send 450EUR from Slovakia to the UAE would be EUR4.90. This rate applies if you pay Western Union through a credit/debit card and your recipient will receive the money as a cash pickup. Furthermore, Western Union would tell you how much you will be paid upon checkout. This way, you can review your fees before you continue the cash transfer.
A resident individual may send up to $2.5 lakh in a year. An NRI with a Non-Resident Ordinary (NRO) account may send up to $10 lakh in a financial year. An individual with a Non-Resident External (NRE) account or a Foreign Currency Non-Resident (FCNR) Account does not have any such limits.