It should be understood that the reason why Jesus and the apostles quoted from the scriptures is to show that what He is doing or saying is IN FULFILLMENT of the scriptures. He recognizes the old testament and the new testament connects very wonderfully to it. Ang apocrypha mag lubog lubog lang ani. A sensible person would not expect the new testament to contain everything in the old testament.
Simply put, if the koran talks about peace and in the new testament peace is also mentioned, that does not mean that koran and the bible is connected. Murag sayon sayon na siguro ni sabton.