Hi Prathima,
we are presently running a training institute in Delhi, what you need to understand first is the kind of trainers you are going to employ, are they experienced enough? secondly do you have a tie-up for placements with a call center in your city? the city where you intend to setup your institute does it have a good population of english speaking youth, you need to buy a few softwares for thaining on voice, english accent, pronunciation etc. if you need more info on this contact me.
Amit