No, not at all.
No, all of the Wiki sites are not owned by one company. For example, WikiAnswers is owned by the Answers Corp. (answers.com), while Wiktionary is owned by Wikipedia.
Despite the same "wiki" prefix, WikiAnswers and Wikipedia are not owned by the same companies. WikiAnswers is owned by Answers.com, while Wikipedia is owned by the Wikimedia Foundation.
They are the same http://en.wikipedia.org/wiki/Sharon_Osbourne
Outback Steakhouse is currently owned by OSI Restaurant Partners which owns and partners with several chains: http://en.wikipedia.org/wiki/OSI_Restaurant_Partners
No, they aren't. Many sites use the word "wiki," but they are not related to each other or part of the same company. They do all use the wiki concept of letting regular people build the content and improve the site.
You need to be 13 according to Yahoo Answers to create an account,same for Wiki Answers, Facebook and many other sites.
WikiPedia and WikiAnswers are both separate companies but yes they are free to join. You can signup without having to worry about membership fees of any kind charges. You can also contribute to both sites as a guest without an account.
See: http://en.wikipedia.org/wiki/Territories_of_the_United_States
you should never trust sites that are not legel
No, it isn't the same. The two sites have nothing to do with each other, actually, other than both using the word "Wiki." That indicates that we are based on user content, not that we are part of Wikipedia.
Wiki is not a person is is the people who use it. Just click Answer
Neither copied the other. Both sites are based on the wiki concept, meaning that anyone can contribute to the content on the sites. There are lots of wiki websites on the internet.