User blog comment:Icecream18/Wiki question/@comment-4674838-20120830013435

If the wiki is inactive and no admins have edited with 60 days, you can post an adoption request >>> here <<<. When you click this link, make sure to read the guidelines where it says Click here for the adoption guidelines before making your adoption request. By adopting a wiki, you would become an admin and bureaucrat and be able to promote other admins as well.

As for editing protected pages -- admins can edit protected pages, so if you can't edit it, you need to find an admin (or adopt the wiki and become an admin yourself) to edit it.