Chennai

SRM University, Chennai, KTR campus is better than MIT, Pune for engineering and the other degrees. SRM university offers better education and the placements at SRM university are really good. So, you can go for SRM university main campus alone.

PSG College of technology, Coimbatore is better than SSN college of Engineering, Chennai. Both come under Anna university affiliation, but the standard of PSG and its reputation is higher than SSN College, Chennai.

VIT Vellore campus is only better for computer science and engineering and also for all other courses than VIT Chennai.
So, if you don't get the Vellore Campus, then prefer the Chennai campus of VIT university.

No, you need to have at least 188-190 cut off marks to get admission for electronics and communication engineering at SSN College of engineering, Kalavakkam.
For previous year cut off marks refer:
www.cutoff.tnea.ac.in

To get admission into a good government college in Chennai or Tamil Nadu you need to apply for single window counselling under Anna University. If you have a good aggregate marks in PCM out of 200 (may be 190/200), then you may get a good government college or affiliated colleges.

You may refer the link below for the list of colleges in Chennai that offer master of computer applications (MCA) :
https://www.shiksha.com/it-software/colleges/mca-colleges-chennai

Yes, it is a better option. Vel Tech University is a good university to pursue engineering (B.Tech). It offers good education and training. The placements are also good. So, you can prefer it, if you don't get any other better option.

Hello Mrigen,
you may refer the links below for the list of colleges for audio and sound production colleges in Chennai, Mumbai and Delhi:
1) https://www.shiksha.com/mass-communication-media/music-sound-production/colleges/colleges-chennai
2) https://www.shiksha.com/mass-communication-media/music-sound-production/colleges/colleges-mumbai
3) https://www.shiksha.com/mass-communication-media/music-sound-production/colleges/colleges-delhi

Hello Malar Vani,
You may refer the following link given below for the list of colleges in Chennai for Bachelor of computer applications (BCA) course:
https://www.shiksha.com/it-software/colleges/bca-colleges-chennai
All the best!

To get admission in Madras Institute of Technology, Chennai, you need to apply for single window counselling under Anna University. It is affiliated to Anna University, so you need to apply for that counselling.