WordPress admin toolbar not loading styles after migration

When you move a WordPress install, you need to also edit two fields in the database. Run this against your database in order to find the values that need to be edited:

SELECT * FROM `wp_options` WHERE option_name IN('siteurl', 'home');

If database access is not an option, another way to do this is by editing your wp-config.php file to include the following two lines:

define('WP_HOME','http://yoursite.com');
define('WP_SITEURL','http://yoursite.com');

Straight from http://codex.wordpress.org/Changing_The_Site_URL

1. The “Home” setting is the address you want people to type in their browser to reach your WordPress blog.
2. The “Site URL” setting is the address where your WordPress core files reside.