CPT

Check out the following links below for details :
https://www.shiksha.com/accounting-commerce/articles/ca-cpt-december-2018-exam-registrations-open-today-blogId-19329
https://www.shiksha.com/accounting-commerce/accounting/icai-exam.

No, if you pass B.Com more than 55 percentage. You are exempted from CPT. If you pass graduate or post graduate other than commerce. You need to have 60 percentage and above.

Yes, you can join a coaching outside. There is no problem about that. Good luck.

Yes, you can register without results. There is no problem with that.
Good luck!

After entrance exam, they will soon release the admission list in June-May be then you have to go for document verification there.
Good luck.

There's no restriction as such. The only thing you need to take care is first of your attendance in the college. Second, pray that your exams in the college do not clash with the CA exams. Most of the students go for CA and B.Com regular so that's not much of an issue. You need to manage your time in such a way that you can give required attention to both the courses. Plus, if at all you go for coaching either for your graduation or CA then again time management is required.

CA Foundation Exam is the entrance level test in the Chartered Accountancy course and also it is replacing the existing entrance level CPT (Common Proficiency Test). It is part of revised curriculum announced by ICAI and taken into place w. e. f 1st July 2018. More details see at
https://cacourse.net/ca-foundation-may-2019-registration-eligibility-fees-and-time-table/.

No. CA Foundation Exam is the entrance level test in the Chartered Accountancy course and also it is replacing the existing entrance level CPT (Common Proficiency Test). It is part of revised curriculum announced by ICAI and taken into place w. e. f 1st July 2018. For more details see at
https://cacourse.net/ca-foundation-may-2019-registration-eligibility-fees-and-time-table/.

Hi Priyanka, you have to register with ICAI first, then you can appear for the exams of CPT. Further, it is totally your opinion to take coaching classes or not. You can clear the exam with your preparations as well. Thanks.

Here are some top rated Coaching centres in Bangalore for CA-CPT :-
Elite IIT Jayanagar & Malleshwaram
Logic School Of Management
Toppr Technologies Pvt. Ltd
SuccessEdge Academy
B. S Narayan Academy
Eshaa Academy
NorthStar Academy
Surat Academy
Bhat and Bhat Tutorials.