The official currency in Andaman is the Indian rupee.
The international currency code is INR.
its a part of India. so it uses Indian currency and coins. recently some coins named andaman and nicobar are been on circulation, but they are fake
yes, it is grown in some parts of kerala..(Kerala agriculture university), Andaman an nicobar islands and some parts of tamil nadu
No.
Its Indian territory, so you don't need passport. Andaman Islands are heaven for adventures people.