Don't know how to add title_suffix
Use a preprocess function to populate $title_suffix. It belongs in a file called template.php in your theme folder. 

Here's a primer: Setting up variables for use in a template.

A basic example that populates the variable $foo and makes it available to page.tpl.php (Drupal 7.x):

&lt;?php
function THEMENAME_preprocess_page(&amp;$variables) {
  $variables['foo'] = 'bar';      
}
?&gt;


The core module Contextual links populates $title_suffix in its implementation of hook_preprocess(). View source at modules/contextual/contextual.module for an example of how it is done.