You can apply by filling out an online application form, which can be found here (add link to courses page). Prior to submission of online application form, please go through the Admissions Process here 

No, you cannot. The Dev Sanskriti Vishwavidyalaya also does not accept transfer of students. If you wish to follow an undergraduate course at Dev Sanskriti Vishwavidyalaya campus, then you are required to start the course from the beginning.

No, you cannot. One cannot apply for multiple full-time regular courses at DSVV.

You can find your course code on the website here