Welcome to Apple Discussions
There are several options for templates you can use in Pages. First, there those submitted by other users & available at
iWork Community.
Try
Microsoft Office templates. to find links to many PC templates. The
Mactopia site has a lot less templates to choose from, but was less involved to download.
Jumsoft.com also has templates, but I'm not sure how many might be free.
An advanced Google search for the exact phrase Pages templates should return a lot of options.