I found the answer by using forum search. :)
the size of the page titles isn't quite what I want yet. I'd like them the same size as the Post titles
If you are expecting to be able to click a button and change fonts throughout your blog then it’s not that easily done and it's not free of charge to when it comes to changing page titles. These are 3 ways to change fonts on WordPress.com blogs.
(1) Changing font families, colors and size in text in posts or pages either post by post or page by page by coding into the HTML editor. http://en.support.wordpress.com/editors/font-size-color/
(2) Changing font colors in text in posts or pages either post by post or page by page using the #4 icon (Select text color – change the text color) in Row 2 the Visual editor. http://en.support.wordpress.com/visual-editor/#row-2
(3) Changing all font families, colors and sizes throughout the whole blog by purchasing an annually renewable Custom Design upgrade and using Typekit Fonts with Staff support. http://en.support.wordpress.com/custom-design/
Note: Any font changes to font families, colors and size in the blog title, tagline, post titles, page titles, categories and tags cannot be done without CSS editing.