Not sure what you mean by your first problem, but to deal no clothes on registration, it's because registration function states
PHP Code:
$avatar = filter($_POST['avatar']);
If you're using the original registration page, it doesn't contain any "avatar" field, so it's inserting '' into the database.
To simply deal with this, you change that line of code (by searching it in system/app/classes/class.user.php) to
PHP Code:
$avatar = 'hr-100.hd-190-7.ch-210-66.lg-270-82.sh-290-80';
This is (was) the default Habbo look & you can of course change it to whatever you like.