JEE

Yes.But in 2017 it must not be more than your 3rd attempt for mains.

Bharath ! dont worry if you havent got good marks in jEE mains.there are many good universities who conducts their own entrance examination and allot seats at high scholarship based on that score.here are some of the good colleges where you can enquire about the admission:
1.BITS
2.VIT
3.Lovely Profess

If you are not qualified then you can
if you are qualified go for advance

Don't worry if you haven't done well in JEE mains.There are many good colleges who conducts their own Entrance Examination to allot the seats by giving high scholarship.These colleges are doing equally good as Top Government College.here are some of these colleges where you can get admission:
1.BITS
2

yes you can try in any govt college of mahsrashtra.

may be in state gov collage.

Click the following link for detailed information :
http://www.chitkara.edu.in/admissions/admission-procedure/
The chances are very less based on your JEE score, but you can sneak in based on your percentage but the availability of required stream may vary

No,its not possible.

u can prefer any branch as it depends on your interest but as u score less you can prefer electronics or extc as it is avg and evergreen branch .If u have interest in computer then I prefer you go to computer engineering and not MSCIT