petrol pump in nagercoil

sir,
i am very much intrested to start a petrol pump in nagercoil, capital of kanyakumari dist in tamilnadu.
sir pls, i want to known,
1. Land requirement.
2. Capital Investment (any optional).
3. Any other information pertaining to the project.
4. Legal rules and regulations to petrol pump.
Thanks in advance for reply