It depends on the artist. Most never did.
There should be a notation with the number that print is in the run followed by a slash and the total number of the run. If the print is the 9th in a run of 100 it would read: 9/100.
For materials created after 1923, you would need permission from the copyright holder to copy and distribute the work, even though it's out of print; as publishers are fond of explaining, "shelf life has nothing to do with copyright term."
No. That would be CopyRight Infringement
Yes; but the vast majority of uses would require licenses from the copyright holders.
Because protection is automatic, a notification is not required: everything is protected by copyright unless it specifically says otherwise.
No, you cannot put a copyright symbol on anything. Copyright protection applies only to original works that are fixed in a tangible form of expression.
Copyright is a complex legal issue especially with the numerous amendments etc. Basically it is free of copyright BUT recordings would have copyright as would the printed music, that is, the music publisher would have copyright on his production of the printed score. An example is and please do not take this as binding legal advice - you decide to put on Carmen in your town hall so you photocopy the various parts of the score - your photocopying most likely breaches copyright. As I said its complex.
All WWE videos are protected by copyright.
Most school textbooks are not available via ebooks due to copyright laws. Using software to put a textbook as an ebook would violate international copyright laws; contact your school institution for availability information.
It depends on how much ink you put on each page, but you can probably print out 300 to 500 pages per cartridge.
If the design meets the minimum requirements for copyright protection, yes.