I also wonder how trustworthy the New Testament is on these points, given that the writers probably knew about all of these predictions. Some of them are obviously a matter of historical record, but others seem like they might have been easy for the writers to just put in there for the sake of lining up with Old Testament predictions (30 pieces of silver, 'suffered vicariously,' thirsting on the cross and given vinegar...).

EDIT: OP mentioned this possibility. I should learn to read.