The transition from "bio page" to "profile" was made to bring WikiAnswers more in-line with its parent website, Answers.com.
You click on their profile and you'll be directed to his or her profile page, it's also called a bio page.
You can design your profile page by going to your profile, clicking "Edit this Page", selecting your background color, and then saving.
Yes, it is allowed.
To add the wiki-holic badge to your wikianswers profile page there is a link that you can copy and paste.
Here, on WikiAnswers. Specifically on your own profile page.
If you are talking about your profile page you cannot. All pages are public to others browsing the site so they can see who answered what and when.
For now, you cannot relink a different picture to your WikiAnswers account profile picture, but if you used a social networking site such as Facebook, your profile picture on facebook will be the profile picture replacing the orange guy on your WikiAnswers page. For an example, I linked my Yahoo email to my WikiAnswers account, and the picture I have on Yahoo will be the picture on my WikiAnswers profile (check it out if you want).
Yes however not all html tags will work.
Often you can find them on their Bio/Profile page.
Well, it's sorta impossible to tell. Green, probably cause the page is naturally green if you don't change it
Go to your profile Under your profile pic click 'change skin'
You can post pictures on your profile page. For information on how to do this, please see the related question.