How do I change my blog title font size and serif typeface in views?
You may need to add a class name to the view to make it easier to specify the view
at admin/structure/views/view/[view-name]/edit -click-to- advanced click-to- CSS and create a name for the view, this will help to label the CSS.

Then:


If your theme has the option to change the font size and typeface, just change it in the theme. Adaptive theme can do this, https://drupal.org/project/adaptivetheme , for instance. If you only want one view to be different, this will not work.
Otherwise create a new subtheme and modify CSS as needed to change your view font-face and size. https://drupal.org/node/225125
An easier option: using the Sweaver module to interactively change CSS often without having to resort to editing any files, uses a GUI. https://drupal.org/project/sweaver . Be careful to only select that view.
Another easy option can use the CSS Injector, to create specific CSS to override existing CSS: https://drupal.org/project/css_injector and again, select the specific view element for title.