IIT is certainly best an dmost coveted institute with national importance and all older IIT Like Delhi, Munbai, Kharagpur, Guwahati,, Gandhingar, Madras, are some if topnotch for placements, faculty and learning methodology with an average package well above 4.5lpa every year  And having global recognition . 

Automobiles engineering under Mechanical engineering disciplines is not alloweed for ISRO. 

Also students must have minimum 65% aggregate marks in all semesters in Btech.

Eligibility criteria sharedbelow. 

https://engineering.careers360.com/articles/isro-recruitment

hii

yeah definately you can do there are various colleges which take through other college exams as well like private universities so that will help you while let me tell u few universities

PESAT universitiy

BITs university

VIT university

SRM university

also check the below link

https://engineering.careers360.com/colleges/list-of-automobile-engineering-colleges-in-india

regards

Mechanical engineering is much better due to wider scope across PSU and Private sector and mor e opportunities and roles like Supplychain, Operations  Logistics, Procurement, Bid and Project management, Manufacturing and. Design. 

Civilengineering has limited scope across design and Urban planning, structural mechanics and Maintenance roles. 

When you are joining B tech after diploma you need to take BE entrance exam.

At the time of counseling you will get a chance to opt for computer engineering or mechanical engineering. But only option of computer engineering you will able to select not all branches.

Hello Tarique 

Please mention the name of the companies you want to apply in and your academic background.

Hello,

May i know which salaries are you asking and regarding what so that i may further assist you.

Hope it helped you. Please feel free to ask any further queries.

Goodluck

Hii

To get a job in BMW is not a peice of cake. Its tough for a fresher to enter BMW India. You can join such a big automaking giant either you have experienced or PPO(pre-placement offer) from during your internship tenure. You can apply for thier global trainee program were they recruit candidates.

All the best.

Hello Kedar Nath,

Well its difficult to say specific amount because its all depends from student and there performance during interview and their academic performance. Apart from this diffrent companies have there own criteria and offering. Well mostly average package goes between 5-6 lakh per annum. This amount may differ.

All the best.