how to start a restaurant business in a metropolis like kolkata?

I am Subrata Boral and I work in an Industrial manufacturing company. We are looking for a diversification in to the restaurant business in kolkata in some prime location in and around park street area. We want to set up a speciality restaurant. I want to know what are the things I will have to first take care of ? Can you suggest any organisation from whom I can seek some help in this regard. Please suggest the best possible way out.

What is the best business to manage online in india / chennai?

I work in a IT company, I am salaried and my living is depend on it. I cannot quit my job, but i am more interested in doing a business. So the possibility is that it has to be managed through online. So, please suggest me a good online business for the Chennai / India region. I can invest upto 5L. If the outcome is more succesfull i will quit my job as well.