Generally, at least under US Law, copyright protection extends 70 years past the death ot the author/creator of the work.
The copyright notice and other cataloging data is usually on the reverse of the title page.
95 years from creation.
Same as copyright notice for anything else: Copyright, or copr. or circle-C, the date of copyright and the author or other copyright owner's name. E.g., "Copyright 2012 Walt Disney Productions, Inc."
Copyright term for software in India is 60 years from the date of publication.
It can be. Notification is not required for protection.
A notice can be added as soon as the project is complete, even before registration.
depends on what it is
Yes.
Stop downloading copyright infringing materials.
Notification is not required for protection.
No. Since 1989 it has not been necessary to put a copyright notice on any work in order for it to be protected
Generally yes it it. The requirement to list a copyright notice in order to be protected was discontinued over 20 years ago.