That's allot of stuff you listed, but I haven't heard of any Pagan documents out dating the JEWISH documents which the Christian documents came from. Furthermore, as George Lucas pointed out, religions have juggled stories for thousands of years before our time.
Honestly and speaking from a non-religious point of view, there is no way to prove who said what first. It could be that Jews were telling their tales by tongue before any other religion took the story and chose to write down what they heard from the Jews as the Jews said it, it could be that all these things did happen and other religions simply recorded it before the Jews did, it could be that nothing happened and none of this is really based on anything other then imagination(meaning no religion stole anything from any religion) and it was all simply meant to teach us some valuable lessons.
Speaking from a religious point of view, I've seen a lot less flaws in the Christian versions then I have in the other versions so I think I'll believe the Christian versions instead. They make more sense to me then the other versions do. Especially considering that the Egyptians don't even have their own religion right(nearly every city had different religions for the same religion somehow) and the Pagan religion has been well known(thanks to historical evidence/artifacts) to steal stories/gods from other religions(from the Romans, to the Greeks, to the Celtics, back to Greeks/Romans, etc).
And it was only a minor religion. Such a minor religion, in fact, that it seems to be a part of a collective rather then an individual practice. At least from what I found in my short time of research on it. Another thing to keep in mind is that our "time-line" for these religions is based on either what people say or how old of a tree-piece we can find. As my fiance would say; we are relying on dead wood and ink from either a sea creature or powdered plant. This source is, to be realistic, unreliable since this only tells us when it was recorded, not when it was made.
Older then the stones the tablets were made from? Older then Egyptian hieroglyphics, the first recorded language discovered? Why hasn't this been on the news more then? Why are they still teaching that the Egyptians have the oldest recorded recordings?
So far I haven't heard anything from a reliable source stating that the Egyptians have Christian stories written somewhere. Yet another thing to keep in mind is that anything you find online may not be as reliable as you'd like to think. If you have the right site you can make your own website easily and tell people whatever you want. You could tell them that DBZ is real and you are from planet Namek if you wanted to. The sad thing is that there are people who would believe you because it's on a website. Some people think, and I'm not saying you're one of these people, but some people think anything they find online has to be true because it is online.
Quoting my last post; "So far I haven't heard anything from a reliable source"
Most important part being "from a reliable source". Although I do trust you, I don't trust much of what I find online unless it can show some good evidence to support it. So far everything that is intended to bash Christianity that I have found online was only half-researched and mostly opinions made by someone who simply doesn't like Christianity. Give me at least three links to good, reliable sites that have evidence to support their claims and I'll consider changing my beliefs. Until then My previous posts say all that I have to say about this topic. Mostly the one stating that nothing can prove which religion was made first, only that the Egyptian religion is the first one recorded.
