Hello mohit,
Let me first inform you that from November 2019 CPT is being replaced with CA Foundation.
The documents required for the registration are:
1. Attested copy of the 12th Marksheet
2. One latest coloured photograph to be affixed on the hard copy of the form
3. Attested copy of special category certificate i.e. ST/SC/OBC or differently abled, if required.
4. Attested copy of 10th marksheet/admit card indicating Name and Date of Birth.
Registration fees for the CA Foundation course are Rs 9,000 plus Rs 200 cost of Prospectus plus Rs 200 (optional)  for students journal.
You can follow the below link for more details on the course.
https://finance.careers360.com/articles/ca-foundation
Hope this helps.
All the best!