B.Tech

You can pursue M.Tech in ME or Automation or IT.

Not really. I myself had a gap year with no work experience. This gap doesn't affect your admission as long as you justify the year and what contribution it made to your life. You can go ahead and prepare well for the NMAT'17.
Good Luck.

Nowadays, robotics itself is offered as a B.Tech specialisation by most of the colleges.

Chaitanya Bharathi Institute of Technology
PES Institute of Technology
SASTRA University
Karunya University Request E-brochure
Sir M Visvesvaraya Institute of Technology
M.V.J. College of Engineering

Check out the link below:
https://www.shiksha.com/b-tech/ranking/top-bio-technology-colleges-in-india/54-2-0-0-0

There are many courses in car automobile designing like 3D modelling, computer-aided style, race car design, vehicle branding etc

You need a minimum score of 55% in B.Tech.

Hi,
You can transfer your credit from Indian University to Australian. But, for that you have to approach to the particular university, where you want to apply or you can contact to study abroad counsellor for guidance and support.
All the best.

Below mentioned are the top 3 college in Mangalore:
1. Shri Devi Institute of Technology.
2. St. Joseph Engineering College.
3. Bearys Institute of Technology.

Your percentage in BE is a bit lesser than 60%, but you have a good CAT score, thus, you have good chances to get a call from SDMIMD.
All the best!!