Can M.Ed be done after M.Com without doing B.Ed?

No, Bachelors is must for Masters degree. It can be anything.

M.Ed Eligibility Criteria: Any person who has successfully cleared his Bachelor of Education i.e. B.Ed from a recognised institution with at least 50% marks is eligible to apply for this course. Students with a B.El.Ed or BA in Education can also apply to the programme. So, B.Ed is compulsory for

No, you can't. If you want to pursue M.Ed, firstly you will have to pursue B.Ed course.

Yes, you can do it directly.

For MEd eligibility criteria is BEd in majority of Indian universities. Therefore, you can not do MEd after MCom.