I need to move my wp-content folder in another folder.
For example, this is the wordpress folder:
If the content is shown, that implies that the definitions you have added to wp-config.php are working properly.
Incorrect styling implies that there is a hard-coded path within your theme files. For example, the theme creator used:
// Incorrect
echo '/wp-content/themes/themename/css/stylesheet.css';
Instead of...
// Correct
echo get_stylesheet_directory_uri() . '/css/stylesheet.css';
Or even an incorrect call to content_url.
You'll need to find these hard-coded URLs/paths, and update them to the correct format.