Science

As you have 2 years of work experience, you can go for Diploma course in Automobile field. Diploma course will enhance your skill set. Diploma course will make you eligible for more job opportunities. You can also look for some short term courses specific to your field.

Hi Chhavi,
There are many institutes which provide scholarships to their candidates. It is advisable to get in touch with the college officials for detailed information.
http://gfts.kar.nic.in/Contact-Us.html

Have good knowledge of any field of your interest. Even if you love to play any sport, became a master in that or any other field like Science, Medicine, Finance or Arts. You can even a become a good Hotel Manager and get into top hotels like ITC, J. W. Marriott or Taj. Just work hard in your interested domain, get as much knowledge as you can. Continuous learning is the only way to reach at top.

Have a look on this website to get your answer. Application form for all the courses are opened on the same date. https://www.shiksha.com/university/chennai-mathematical-institute/cmi-entrance-exam-dates.

There are many courses in which one can go for. It can be BBA, B.Com, CS, CA, BA. Career in animation is also an option, hotel management, event management, Foreign Languages, etc.

SCIT provides MBA in ITBM, MBA in DSDA, Executive MBA program and PGP-ITBM. MBA-ITBM course offers a variety of specializations that will be beneficial in the IT industry. You need to be a Graduate of any faculty of any Statutory University with 50% marks at graduation level to qualify for admissions in SCIT.
All the best!

Yes, you can do ITI. There is good number of field in it. But, you must be choose according to your interest.
All the best.

Yes, you definitely can. There are three pathways to appear in IISER exam I. e. Either through KVPY or JEE or SCB. Since you have dropped mathematics you can either go through KVPY or SCB. So, check your SCB according to your state and then you can apply if you qualify the cut-off marks.
All the best!