Commerce

You can go for BBA and after that you can pursue MBA.

You can try in IP University. There are a number of colleges that are known for BBA and there are many private universities.

Hello Abhishek,
You can pursue B.Sc in information technology, computer science or data analytics. These are the courses which can be done after doing 12th with computer science.
These are the in demand courses in India in the current market. You can get employed in any top fortune company in India and abroad too.

Yes, you have to choose a college in your preferred location and submit the admission form. If your name comes in the counselling then you have chance of getting admission.

Around 75 colleges are under Delhi University amongst which 50+ are of commerce.

As you have scored 78 in class 12th, so it is not possible to get admission in DU. So, go and check private universities and decide your course according to your interest.

It is dependent upon your interest. You can go for CA and courses related to finance and marketing.

Every college have their own hostel and fees structure. You can check their website and contact directly with the college of your choice.

Yes, you definitely can get admission in Master's degree in any foreign language. You are eligible for that. You can take admission in a good college or university.
Good luck.

Yes, the syllabus is same but the pattern of annual examination is somehow different in both of them.
Hope I have solved your query. Do upvote if you are satisfied with the answer.