Yes, you can set up domain name forwarding for .taipei doman name to direct your visitors to a different website.
No, you can choose to renew the domain name or not. You can find .taipei domain name life cycle here.
Yes, you can registrar a domain name for brand protection only.
Your domain name will be resolved to your website once you set up DNS or related DNS records.
Generally it takes about 24~48 hours. You can contact with your registrar for detail information.
.taipei.taipei represents Taipei City, any things relate to Taipei (City) are encouraged to use a .taipei domain name.
Yes, you can set up DNS with IPv6. Detail can be found at your registrar.register.