I have been here for 6 years and as far as I know 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: A few themes do provide for changing font color in the Blog Title and/or optional Tagline and/or links. In the majority of themes font changes to font families, colors and size in the blog title, tagline, menu, post titles, page titles, categories and tags, widget headings, comments, and links cannot be done without CSS editing.
So just to be clear I see Consolas font only in the editor. I do not see it on the published posts or pages. I assume you are referring to this blog http://adrienneadams.wordpress.com/ as the one linked to your username is not a WordPress.com free hosted blog. If so then that blog is wearing the Twenty Ten theme. Twenty Ten is display Georgis font in your posts in that blog.
Just to be clear, are you saying that if you use the HTML editor as I decsribed here (1) above that you cannot succesfully change font families, colors and size in the Twenty ten theme blog?