University of Madras

Yes, you can surely do MSc in Zoology, you have a good score in graduation.

Yes, you can apply for the course at Madras University, check their website for application details.

use this link to create an account and continue the admission process, if eligible an option to register yourself as a international student would come
http://online.ideunom.ac.in/newone/index.html
international student eligibility is a bit confusing, when it comes regional Universities. There's an option to contact to institution as well. Please talk to them to clarify any queries.

Yes, there is are good placement opportunities available for you.
After pursuing MA in Journalism and Communication, you can also apply for various competitive and entrance exams.
I would like to suggest, you appear for UGC NET Exam. As this is one of the best tests through which you can pursue your career as a researcher or teacher.

chances are very less.

There are 45 Seats (Reservation Policy of Govt. will be adopted). 5 Seats for Foreign Nationals & NRIs.
The method with which you will be getting a confirmation from the university that you are selected is by E-Mail. You will be getting an email for the confirmation.

Yes, you can do it if your marks are 50% above.

Yes, you can do this course as the eligibility criteria for admission is that you have to score 50% or above in your 10+2.

Yes, you can do it if your marks are 50% or above.