how to remove header and footer from the first page of every chapter of a book in MS word?

You will have to put a section break between each chapter and check "different first page" on the Header & Footer Tools Design tab.

I would put a next page section break on the last page of each chapter- Page Layout tab, Page Setup group, Breaks icon.

Word has a nifty footnotes feature that puts in REAL foootnotes, just above the footer area. It even takes care of renumbering them if you add, delete or move any references. Under Word XP (2002) and 2003, you could insert footnotes by clicking on the Insert->Reference->Footnote menu item, but I don't know how to get there with Word 2007. If you can get find it, you'll wonder how you ever wrote a paper without it.