1. Your :443 references suggest that you're trying to run SSL on your localhost setup. But if you haven't bought an SSL certificate for your localhost (and it's very rare that you would ever do that), then you'll need to set ENABLE_SSL and ENABLE_SSL_ADMIN to 'false' in your configure.php files.

2. The mentions of .htpasswd suggest that you've added password-protection to some folders using .htaccess rules. You probably copied that down from your server, but since your localhost doesn't know the passwords you're getting errors. On localhost you'll probably want to simply remove the password-protection statements that you've put in your .htaccess files, since you probably don't need that password on your localhost, right?