About price for people's sin, and Jesus paying for them is not valid in Quran. If the story of Jesus was a movie without any sound/narration, they would look almost same in Bible and Quran version, but they are different in a lot of parts. People betraying him, his death, him being with god now, and that he will return parts are same.


Everyone's sin is for themselves. Also children do not get born with sin, they are pure and without any sin.