Economics

Hi,
If you are planning to prepare for the entrances by self-study, the following website can be of some help: economicsentrance.weebly.com. Site has a forum, past year entrance exams of the top MA programs and their answer keys and other useful links.
Solve the past year exam problems of JNU, ISI and DSE. Also, do the following online courses along with their problem sets and follow their deadlines sincerely for maximum benefit.
Microeconomics - 1: Finding Demand
Microeconomics - 2: General Equilibrium (Pure Exchange Economy)
Microeconomics - (offered by MIT) on edX [starting on Sep 19]
Principles of Economics with Calculus (Archived course but the lecture videos and other content is available)
Game Theory I (Archived course but the lecture videos and other content is available)
Introduction to Probability (Archived Course but the lecture videos and other content is available)
Econometrics: Methods & Applications (Archived Course)
The Power of Macroeconomics (Self - paced)

Hi,
It depends on what profession you want to choose after you post-graduation. If you leverage your MA (Economics) properly, you may end up in an MNC in Business Analytics department (The pay is amazing in this kind of job). There is a lot of demand for people who are graduates in economics, B.Sc mathematics, statistics, etc. as it involves lot of analysis to forecast something. Of course, becoming a lecturer is also an option here. I am not sure of other areas.
(Becoming a finance minister is also an option I guess)
If you do M.Com then you can join any firm who are looking for an accountant in the Finance Department (But pay is less). Or you can choose lecturership in a commerce college.
Based on my reply, choice is yours.
Note: My suggestion is little different you are interested. You can go for MCA and later can join a software company as a coder or tester. Trust me, I am a B.Com Graduate and I have done M.Com, MBA and MCA. I am currently working as Business Analyst for an MNC with a decent salary.