The answer to this question is not as simple as it looks like. There are lot of factors which determines the cost of capital required to start the business. Some of the main factor that are required to be considered are the following:-
First and most important factor is location, as cost vary a lot at different locations
Second thing is size of restaurant one want to open
and the in comes to which cosine do you want to serve
then how much trained and experience staff you hire
How much you want to spend on out look of you restaurant