For the NLUs and government universities, approximately 9 lpa at entry level gross after the 7th CPC. I didn't include employer's PF contribution here, you can add another 60k-ish p.a. for that at entry level. An annual increment of about 40k p.a. (might be more depending on the DA being given by the government). You are entitled to an increase of about 60k p.a. after you have finished your MPhil, and about 90k p.a. after you have finished your PhD. Other than that, there are going to be 5 promotions throughout your career. One after 5 years (4 for those with PhD) (Senior Scale Assistant Professor), second after another 5 (Selection Grade a Assistant Professor), third after another 3 (this makes you Associate Professor), fourth after another 3 (this makes you Professor), and final one after another 10 (Senior Professor). Each of these promotions you are entitled to regardless of the vacancies available at your institution (these are under the UGC CAS system). You can try to shorten aforementioned periods by applying for any vacant Associate Professor or Professor positions directly after 8 and 10 years of service respectively assuming you've got your PhD. Each of these promotions come with an increment usually equivalent to the annual increment of 40k mentioned above (would be more when you become AP and P respectively).

Private universities follow whatever rules they want to. Jindal of course is the best paymaster. It offers around 12 lpa to freshers (can be upto 14 if you have got industry work ex), plus free quarters, medical insurance, and research grant. These are for their Junior and Senior Research Associates. Full time Assistant Professors can get upto 18 lpa plus said perks. Associate Professor can get upto 22-24 lpa plus perks. Professors upto 30 lpa plus perks. Perks would also increase according to designation. But there's considerable negotiation involved and differential pay for different people.
Of other private universities, a lot pay less than 7th CPC. I don't know of any private law university in India other than Jindal which regularly pays more than 7th CPC salary to all its permanent employees.

Hope this is of some help to you.

If you have got UGC NET clearance and/or PhD, then not that difficult. Especially if you have graduated from an NLU. A foreign LLM would help further. Private universities keep recruiting throughout the year still, but not all of them would pay Seventh Pay salary. NLUs recruit less frequently, about once every 5 years on an average for permanent positions. But there are many NLUs now, so there is at least one opportunity every year. Places like JGLS recruit on a rolling basis if your CV has got the NLU+ foreign LLM tag (some industry work experience would be even better).