I am developing a free website which generates some codes. I am looking for a "Term of use" and "Policy" for my website.
My question is can I use one of those existing licence? for ex (BSD,GPL or ...)
Do you guys have anything in mind?
Usually such licenses contain the terms of using the licenses themselves. Just read them. Usually you can use them. By the way, CodeProject contains a reference page on the default set of licenses offered to the authors of articles. Please see: http://www.codeproject.com/info/Licenses.aspx.
For a detailed reference on Open-Source licenses, please see: http://www.opensource.org/licenses.