I Have I-tunes Library, I Want To Take A Song Out Of My Library And Attach The Song And Send The Song Through My E-mail To One Of My Contacts! How Do I Do That?

First its not a good idea to piggyback your question on someone else's. This can lead to confusion. You should start a new thread. So I've moved your question to its own thread.

Second, basically you DON'T do this. That would be an infringement of the copyright known as piracy.

Also, songs downloaded in iTunes are copy protected, so even if it weren't illegal to distribute them, you still wouldn't be able to.

Yep. There is no way that this will work- it is illegal to send Itunes music because you paid for it once, so you get one copy. That's just the way it is.