Hi,

The syllabus of examination of each posts are available in the official website of TNPSC

http://www.tnpsc.gov.in/syllabus.html

The syllabus may vary every year so please check the syllabus published in the official website for preparation. You haven't specified the post of the exam you are giving so an accurate answering is not possible. However once you get the syllabus you can start collecting previous year question papers and state preparing for it. You can also check study materials available for particular exam and prepare with the help of it. All the best.

Hello,

IGNOU is a recognized university, and BEd program which it offers is valid hence it's applicable for government jobs as well, but you cannot apply in IGNOU based only on eligibility of graduation, there are also requirement of work experiences as well, so if you fulfill that then you need to appear for BEd Entrance Exam which is conducted by NTA, for more details regarding this, visit the official website at  ignou.ac.in

It is not mandatory or compulsory to do so.. But if you do you get an extra edge over getting jobs since you have done masters in the same field and you've almost in depth knolwedge about the Forensic science course. Coming to your second question now, there are many top govt institutes recruiting forensic science aspirants in TNPSC. Some of them are - Junior Scientific officers, Government of Forensic Science Dept, Tamil Nadu.

Refer to the sites below for more detailed information..

https://university.careers360.com/articles/5326-Career-review-Forensic-Sciences

Best wishes. Thank you.