Degree

No, backlogs need to be cleared before any higher study. Clear your backlogs first because most colleges will refuse to give you admission until you do so.

This depends on your area of interest. If you want to continue your career in the pharma field then you should do MBA in pharma itself. If not, there are many other fields you can go for.

The college you mentioned provides the said course.
https://www.shiksha.com/humanities-social-sciences/political-science/course/master-of-labour-welfare-mlw-veer-narmad-south-gujarat-university-surat-171796

I think you can. Your PG degree must have mentioned somewhere that you are a Bachelor + Masters. So, you should be able to apply.

Yes. But, sometimes, colleges require that you submit a self-declaration stating that you will clear. Your backlog before a set time or your admission will be cancelled.

MBA in India is 2 years and is considered a Masters Degree. In foreign nations however, it can range from 1 year to 3 years. You will have to check each college individually. Also, not all courses are considered a degree. You will again have to confirm that for each college.

To pursue a Degree programme, you need to have passed 12th standard. Thus, if you have done ITI after 12th, then you can explore a degree qualification. Ideally, you should try and pursue a course keeping in mind your interest areas and long term career aspirations.

I prefer you to go in NID and apply for it and view the previous year admission list of students. You will be considered like a B.Tech student only, so go for it.

Dear Sachin,
Choosing between M.A. and M.Sc. in economics, you are to see the course contents whether both or which one is with thesis. Go for post graduation with thesis so that scope for doing Ph.D. is kept open. However, Masters in Economics has a bright career prospect as well as salary if projected in befitting way. For better life I mean happiness - which is required to be dragged out from your own resource that is from your mind. That's a separate chapter - and I think I'm not the right one to discuss on it.
Best wishes.