This site uses Google's account system. Create a Google account if you don't have one. When login required, you will be redirected to Google's login page and return when succeeded. We have no touch on your password, so you don't need to worry about your account's security.
No. Due to account security considerations, we do not provide auto reservation or auto order service.
No, but you can configure your mailer to make auto-forward to other addresses instead. (e.g. Gmail has very nice filter support to forward specific emails)
Other users may have taken what you were interested before you accessed the page. Therefore you need react as soon as possible if your target is an exclusively-ownable resource.