Colleges in West Bengal - Other

Yes, WBJEE is the only way to get admission in Jadavpur University.

For admission in mechanical engineering branch at Jadavpur University, you must target to secure a rank under 500 which equates to around 135 marks out of 200 in WBJEE.

Your rank must be under 200-250 in order to get admission in Jalpaiguri Government Engineering College (Mechanical Engineering).

Minimum Eligibility to apply for this course is that candidate should have a minimum of 60% pass mark in class 12th, and candidate must have English at 10+2 level with 60% marks for General (54% marks for OBC category). For further details regarding this course, please refer to the link provided below:
https://www.shiksha.com/humanities-social-sciences/languages/course/b-a-hons-in-english-visva-bharati-university-west-bengal-other-74820

The exact date has not been announced yet. You can keep a check on this link of the official website to stay updated http://www.visvabharati.ac.in/Admissions.html

There are only 2 quota systems. Home state and other state quota. If you are from Madhya Pradesh then the quota system for you would only be available in colleges in Madhya Pradesh.

IIT's are always best. No comparison although CSE is always in demand.

You can refer to:
Commercial Art Techniques by Raviraj
Encyclopedia of Calligraphy Techniques by DH Wilson
Designers Poster by Rockport

It depends on which stream you want to get admission.
In JGEC, for C.S.E your rank must be max 600.
For EE-200
ECE-200-400
IT-2000
ME-200-300
CE- 150