Has the Quran cleared all the incoherence and errors in the bible, if this is the case, can it be used gather those items of informations which does not contradict the Quran ?
Well, you cannot say that Quran has corrected all the errors in bible, Quran is a separate book and bible of the time when Quran was revealed was corrupted, but muslims do agree it was not VERY corrupted. We cannot compare that time's bible with today's bible. So, i don't know how quran would have corrected anything which was corrupted after its revelation though.
Being said that, as we all know, Islam has always been the religion of Allah, it's just how people transformed it and changed their books and their meanings. So, w can take anything from christians/jews or in this case form bible, which has no contradiction with islam. But if we find even a slight contradiction, we will leave that thing.