Wiki

I'm using the wiki in groups with my students and l'm encountering a series of difficulties 1- How do you change the order of the pages in a wiki once you have created them? 2- How do you add the title of the page in a wiki once you have created it (that is to say, I have created the page but forgotten to name it) 3 How do you insert a Voki so that it opens directly IN the page of a wiki? Thanks a lot