I would like to know the split up number of calls which comprise the 350 free calls I am eligible, i.e how many local (Chennai), STD, mobile calls etc. within and without the Tamil Nadu State

Welcome K A GOPALAKRISHNAN to eTI community.
Your post has been approved.

Now coming to your question, you get 350 calls per month under One India plan, it means you will be charged Rs. 1 per minute for all kind of call be it on mobile, national or local.