Hey Kevallaw

To become an assistant professor your academic record should be good with  55% marks in the LL.M. Degree. You will need to clear the national eligibility test (NET) conducted by the CSIR, UGC.
The ones with Ph.D. degree are exempted from the requirement of the minimum eligibility condition of NET.

The average salary of an assistant professor of Law in India is around 5.1 to 6.4 lakh.

I hope your doubt is clear. All the best.