I have a client who want to insert a print this page link that launches their print utility. Is this possible with Muse?
This is not a function of Muse. You'll need to use the 'insert arbitrary HTML' function to add this.
Beware that Muse only produces a generic stylesheet and does not define its specific media type. That means that printing a Muse-generated web page or rendering a Muse website on a mobile device can be extremely messy. Elements may fall off of a page or may be sized oddly. The Muse showcase shows how the Horace and Lydia site falls apart in print. Elements appear broken and blank pages result.
Muse developers need to employ semantic markup so that users can design stylesheets for different media types. This topic is related to the frequent requests that Muse should be able to design for mobile devices. Muse just isn't smart enough to do what a professional designer would want.