Well, let's start at the beginning, shall we. The garden story of Adam and Eve is very similar to the much older tale in the epic of Gilgamesh. The flood story is nearly a one to one copy of the epic of Gilgamesh. The resurrected god is a very old archetype, featured in many religions much older than christianity.
The list could be continued, but I wait and see if it's worth the effort.
The list could be continued, but I wait and see if it's worth the effort.