Class 12-Commerce

Sorry, but you cannot pursue BCA. In order to pursue BCA, you need to have maths in HSC.

You can opt for B.Com accounting and finance and try to score good marks in your core subject.

It depends on your interest but here I try to give you some idea which may help you to clear your confusion.
If you are able to work hard and have a good logical grip on your subjects, then opt for CA or CS.
If you have a good soft skill and communication skill, then you should opt for BBA and MBA.
To make your career in the IT sector, you should pursue BCA and MCA.
otherwise, you can choose B.Com.
According to me, you should select BBAand MBA or BCA and MCA.

You should opt for B.Sc in catering science.

You need to opt for PCM in HSC. In graduation, you should pursue B.Tech. You can also complete +2 (1-year) course from NIOS.

According to mem you should focus on what instead of where. You need to figure out what you want to study and then accordingly decide the best place for that particular course.

You should opt for BBA. It is the best choice.

It depends on your hard work. It takes a minimum of 5 years for a person to become CA.

Maximum reputed institute need 60% aggregate percentage in class 12th. But, you don't need to worry because many other institute are here for BCA with your eligibility. All private institute has management quota, so try to get admission through management quota by getting provisional admission.

It will depend partly on your IELTS scores. If you manage to get 7+ overall bands, then you can apply to any top university under SPP. If you get less than 6.5 bands then you will have to go for non-SPP application.
Also, please mention which course are you interested in pursuing?