WordPress Admin Interface not styled properly

I believe the wordpress URL and site URl are not set right.
Please try to edit your wp-config.php adding these lines:

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

Is your index on same folder as wp installation? if not, you need to place it there.

I’m talking about placing the URL in the above lines, not the index on the wp folder.