Capital gains taxable in whose hands

A father has given a property as gift to the son. Son has further sold the property and purchased a new property.

1. Sale of gifted property would be taxed in whose hands.

2. Whether gift deed plays an important role in such transactions.

3. In case sale would be considered in son's hands, what can be considered as cost of acquisition.

4. Stamp duty should have been levied on transfer of property as gift.