I have completed MBA and M.Com. If I do LL.B. Now will it be useful for My Teaching Profession?

It can be beneficial a little but if you go for B.Ed then it would be more useful that LLB because it is a relevant course to the teaching profession.

No, it will not be of any use, if you are still interested you can buy Avtar Singh's Company law from the market. It will enhance your lectures by including a little details of the companies act. And, also if you are teaching about taxation by Kailash Rai's book on tax law sufficient.

In my view, an LLB will not be of much help to you in your teaching profession, unless you are involved in teaching law topics as part of your profession. It would rather be advisable to pursue M.Phil or research to enhance your teaching career.

Hii. You have completed your MBA and M.Com programs so when you want to do LL.B. Is also useful becouse this is also helpful for you. So this will help in your teaching profession no problem.