Delhi

Refer to the link below to find out colleges for interior designing in Kolkata. the fee differs from institute to institute.
https://goo.gl/QyHFUA

It is an Institute of Ministry of Finance, Government of India. You may refer our website for the details.

There is no specific institute from where you can take coaching. The best way to clear the exam is to stay updated with current affairs and keep a hold of language. Read books such as India Today, Manorama, etc.

Dear Tarun,
If you can afford to pursue it from some other university then it is advisable to pursue it from English and Foreign languages University (EFLU), Hyderabad. The admissions for distance mode are going on. For further details, kindly visit the below-mentioned link:
http://googleweblight.com/i?u=http://www.efluniversity.ac.in/&grqid=8cNiXU8x&hl=en-IN
I hope this would suffice. All the best and god bless you.

Hello! The best B-school for your budget is undoubtedly FMS, well-known for its best ROI in India. https://www.shiksha.com/mba/course/master-in-business-administration-faculty-of-management-studies-university-of-delhi-north-campus-111548

The detailed information about the college can be found on the college's website.
Yes, VIPS has a pretty good placement cell and moreover the faculty too is helpful there.

Well in North zone I don't have that much of information regarding MBA but FMS and DMS are one of the best colleges in Delhi.