Re: How to get breadcrumbs
Due to limited usefulness, breadcrumbs was removed a few releases ago (apparently the admin interface was still there), but then there were requests to have it again, so it's back in release 2.2. You can update to that version for it.
The reason I say limited usefulness is that a wiki is by nature a flat hierarchy, so the breadcrumb "trail" is always two items, the site index and the current page. This isn't very helpful. There's also a "breadcrumb" module that shows most-recently-visited pages.
In the next major Tiki release, this will be thought out some more and there will probably be a uniform page-top trail for all features (optional, of course).
-- Gary