Did the Catholic religion write the Quran? And was Mohammed married to a nine year old little girl, really?

A friend of mine is muslim and said that Mohamed was married to a nine year old little girl, and his religion doesn't share this fact, with the west because of fear of western law's and customs. He also said that a Catholic, gave him a catholic nun to teach him of the writings of the Quran, and used him to it create and spread hatred against the Jews, who didn't except Ishmael's claim of joint heir ship with Isaac, to Abraham's and his blessing.