Newbie: Using css to style fields in a content type
There is a much easier way, but is still complicated if you're a newbie. Install the Display Suite module and enable Display Suite &amp; Display Suite UI

Go to Structure -> Display Suite -> CSS classes. Add as many CSS classes for fields as necessary. Go to Structure -> Content types -> [xxx] -> Manage Display and you should be able to put the classes you have defined against each of the fields.