Official license to open forex trading(international forex) is not allowed, but still they are operating in India without any fuss in my opinion.
To trade and get a "members license" at MCX you have to apply for it, and I have mentioned the cost associated with getting that license only.
For forex pairs(indian exchange) you again have to go for license, either NSE or MCX-SX.
So the best way to do it is to get a franchisee of some reputed brokerage house which will save your cost and will allow you to trade MCX and Indian forx pairs.
Drop me mail and I will explain you in detail everything, I guess you are catering to customers who are into arbitrage business.
I agree with the suggestion given here by ashu1234
@mb2491 - A "broker" is a member of the stock exchange. Example: Sharekhan, Anand Rathi, India Bulls, Religare, Reliance Money, etc. Unless you are financially "extremely" well-off, you cannot meet the requirements of net worth, etc. which are mandatory for grant of membership. Further details for obtaining membership can be found on websites of the respective stock exchanges.
From the impression that I gather from your above posts, I think you are not good enough at the moment to become a "broker" because your knowledge of the broking business is only primordial.
Instead, you should opt for sub-broking association with any of the big brokers such as Sharekhan, Anand Rathi, Ventura, etc. These broker will allow you to use their resources(electronic data resources, software, backoffice, customer support, advertising and marketing, goodwill, analysis, etc) in lieu of sharing the brokerage generated by your clients.
In my humble opinion, you should not venture into this, mainly because your present knowledge of this business is not deep enough. Try learning more about this business.
In good times, even the large brooking houses and their sub-broking outlets were mushrooming in hundreds. But after the crash when retail investors reduced their participation and activity, it was mainly the sub-brokers who were affected the most because unlike their big parents, they could not sell mutual funds, IPO, gold, SIP, insurance policies, etc. for their survival.