Diploma

Hi Neeraj,
Pursuing class 12th again would be advisable. He would have more chances of getting good graduation course and institution with class 12th certificate. Diplomas are not accepted everywhere as a qualification criterion for admission.

As the fees is not disclosed by the college officials, I would request you to contact them directly. The course offered is part-time.

If you want to do is distant education, then you can do with this percentage. Also, for that you need to visit Law College, and ask for their process about distance learning.

Yes, you are eligible to do B.Tech, but you must have a Diploma in mechanical engineering.

Yes, you can, but it will eat your time. I think, it doesn't make any sense. But, if you want to do then go for it. IGNOU will be good for you. There are three ways to complete your graduation. Credit transfer, lateral entry and breaking study. You will get the admission as a lateral entry.

You can go for Pearl Academy as it is good in placements as well.