Thank you for writing in, please navigate to Theme Options > Typography there you'll see the Root Font Size, Body Font family and color, headline font family and color.
The page background color is under Theme Options > Layout and Design
I advise before you start working on the pages, you configure the Theme Options first because the settings there will be your site defaults styling.
Also, please utilize the Color Manager and Font Manager, to easily change a font-family and color in the future.
Hope it helps,