TDS on NRI

Purchased property from NRI value of 1.2 crore. below are my queries

1. TDS to be deducted u/s 195 and the rate of tax is 20% ??

2. TDS deductor should compulsorily have TAN number??

3. How to remitt the TDS deducted??

4. Procedure of filing the return after deduction of tax.

requesting to resolve the above queries

thanks in advance