Hey,
The Masters degree in Law (LLM) is a two-year postgraduate degree course. The basic eligibility criteria is to have a bachelors degree in law.After LLM,you can work as a lecturer in a law University. The salary,however depends on the place where you are teaching. If you are working for a government college,then salary will be around one lakhs INR and if you work for a private college,it can be around one lakh or above. The salary is however subjected to undergo changes depending on several factors.
Hope this helps.
Good luck.