Certificate

Yes, if you have scored 55% in PCB (HSC).

Please contact the college authorities as all colleges have different eligibility for certificate programs:
https://www.shiksha.com/hospitality-travel/culinary-arts/course/professional-certificate-in-culinary-management-ecole-hoteliere-lavasa-pune-248634

They have 2 sessions. The first batch started on 15th July 2017 and the other will start in November.
For more details visit: http://jrvgti.in/

Master's degree programs are beneficial for both working and non-working candidates, if you are working and have enough experience in your field & would like to improve your profile while you continue to work, IIBM is a good choice.
The benefits of their courses are flexible study, saves time & energy, study while you earn and it costs less too.

You have to apply to registrar examination of the University from where you have completed your B.Ed.

Hi,
You need to check with the college.
Eligibility:10+2 (HSC) or SSLC with atleast 3 years work experience in NGO Sector

Hello Reddappa,
No gap cert is required. But please study sincerely with aim of scoring more than 80%.

In terms of jobs, there is no good scope. However, you would like to pursue it as a PG program.