Showing the total number of pages in addition to the actual page number is straight forward using the lastpage package.
\usepackage{lastpage}
Now you can simply access the number of pages using:
\pageref{LastPage}
Note: You will have to typeset the DVI/PDF twice in order to get the number right.
Example:
\usepackage{fancyhdr, lastpage} \pagestyle{fancy} \fancyfoot[C]{{\thepage} of \pageref{LastPage}} \begin{document} ...
Note: See this recent comment on how to count the number of figures within your document.