Add point on excerpt post

First of all return is used in PHP to return a value from a function. If you want to display something you need echo.

Second, no excerpt is displayed in the lines you are pointing to. The excerpt is retrieved and then stored in a variable $myExcerpt. If you want to add ... to the excerpt you must look in your code where it is displayed. This happens in several lines near the end of the code where under different conditions there are lines like this:

echo '<p class="phome">'.$myExcerpt.'</p>';

You easily get your three dots by changing that to

echo '<p class="phome">'.$myExcerpt.' ...</p>';