BCA

You have to give entrance exam please go through http://www.lnmipat.ac.in/admission. You can find all details related syllabus and fees.

Duration of the course is 3 years. The fees is not mentioned on the official website. You can get in touch with them directly for detailed information.

Yes, St. Xavier's College provides BCA course.
https://www.shiksha.com/it-software/course/bachelor-of-computer-application-st-xavier-s-college-ranchi-329911

Yes, this college provides BSc in computer science. So, you can go there and ask for more details.

Go for testing or support profiles if you are not interested in coding. You can also go for hardware and networking related profiles.

Open Universities are flexible enough. You can enroll in the program of your choice and submit an application stating your problem.
Also, there are many open universities which provide online programs. Check them out. There would be provisions in Dubai too.
All the best

To be very honest, no. Most of the companies require full time graduates. Doing a BCA in correspondence can give you a degree but not jobs.

For this, you can contact to the college authority directly as in my knowledge there is no such provision of getting directly in to the 2nd year of BCA in this university.