May I answer your questions with my basic knowledge as a Muslim?
First, yes, we do mention hell. Islam works on encouragement and intimidation, and hell is mentioned just as it mentions heaven. Of course, a child killer and a righteous person who has never killed an ant in his life won't BOTH enter heaven , right?
And for the sake of addition, our source of information as Muslims is the Quran and what the Prophet said, and I don’t know if you know, but the Quran is the only heavenly book that has not been actually distorted. You can search anywhere and you won't find “two editions” of the Quran or anything like that, unlike the Bible, for example, you will find the Gospel of Luke, the Gospel of John, etc. What I want to get across is, there is no wrong understanding of the Quran, scholars have worked hard to interpret it correctly throughout time.
Also, what was said about the person who has the face of a sinner is wrong information. There is no such thing in Islam. Sinners are tormented according to the sins they committed in life.
To answer your last question, the torment of Hellfire is truly upon the soul and the body, and it feels it and suffers the utmost pain. it is recreated as it was in this world, flesh, and is recreated as a complete body and soul. So the body that obeyed God is blessed with the soul, and the body that disobeyed God is tormented with the soul. Both are restored, the body and the soul, to bliss and torment - together.
My apologies for bothering you again.. and I hope you benefited from what I said.