Diploma

No. First of all, SCDL is not a university and second, it is just a PG Diploma and not a PG degree. The degree must be awarded by a university or AIU must grant equivalence. AIU grants equivalence only to full time PG Diploma of 2 years of selected institutes.
2. Since you hold a Bachelors degree in

Lovely Professional University, Punjab
Acharya N. G. Ranga Agricultural University
Adhiparasakthi Agricultural College
Agricultural Polytechnic Anakapalle, Visakhapatnam, Andhra Pradesh
Institute of Agriculture Technology & RARS, Pattambi, Palakkad, Kerala
School of Agriculture, Greater Noida
Parul Instit

Mcgill
Royal Military
York
are the best colleges.

Hi,
Admission is through counselling based on the rank obtained in Maharashtra Health and Technical Common Entrance Test (MHTCET).
https://www.shiksha.com/b-tech/course/b-e-in-electrical-engineering-marathwada-mitra-mandal-s-college-of-engineering-mmcoe-karve-nagar-pune-234796

This question is really vague. It is better you do research a bit about the courses and then ask questions related to it.

Admission Procedure:
You can visit Lotus Business School, Pune or buy an application form online. Lotus Business School and IPC, Bordeaux will conduct interviews and successful candidates would be rewarded admission to the course. Fees and living expenses
The Tuition fee for the programme is 10600 Eur

Yes, you are eligible. Check that whether college is still taking admissions or not.

No. MBA requires UG degree in any stream. Diploma is not eligible for MBA.

Re apply to that college in first year. College transfer is usually not possible.