Hi there,
Possible with some functions.
Change the image on the login page:
add_action( 'login_enqueue_scripts', 'tu_login_logo' );
function tu_login_logo() { ?>
<style type="text/css">
body.login h1 a {
background-image: url(<?php echo get_stylesheet_directory_uri(); ?>/images/gp-logo.png);
}
</style>
<?php }
Change the URL the login logo points to:
add_filter('login_headerurl', 'tu_login_logo_link');
function tu_login_logo_link() {
return home_url();
}
For the admin bar, you should just be able to add this CSS to your site:
#wp-admin-bar-wp-logo {
display: none;
}