"No unauthorized photocopying" means you need to get permission from the author, publisher, photographer, or any person who produced the original work BEFORE you photocopy the material. Unauthorized photocopying may be a violation of law in most countries.
"No part of this publication can be stored in a retrieval system" means a person may not place the item on anything that can 'save' the material for later use. General retrieval systems include audio and video tapes, computer files, CDs, DVDs, and other items of this nature.
'circulated whithout the publisher's prior consent in any form of binding or cover other than that in which it is published' means the material must remain in its original packaging. For example, the pages in a book must remain in their original format. The purchaser may not cut the pages out of the book and create a new cover or binding for them.
What does "art buyer" mean? An art buyer is a person who purchases paintings or other decorative works of art.
If you have additional questions, please post them and I will be happy to answer them for you.