Before you ask, "What does it say," you need to ask, "What is it?"
Let's say you find a book. It has no title or binding information. It could be a cookbook, it could be a romance novel. So the question, "What does it say" is really premature, until you answer the question "What is it?"
And how do you answer that question? Well, you open it and read it, but read it without any preconceptions.
If the first sentence says, "Once upon a time...." then that tells you something about what kind of book it is. If the first sentence is "Chapter One: Functions and Graphing," that tells you something very different. You would then proceed to read the books very differently, right?
Now, what if you open up your book, and it's in a different language. Well, you would want to talk to someone who is fluent in that language. Right?
If the experts who speak that language tell you that the first sentence is, in its own culture and time, the equivalent of "Once upon a time," then you would accept that it's a story instead of a biology or history textbook, wouldn't you?
And yet, that is exactly what has happened. Genesis 1:1-2:4 is a myth. Those who are fluent in Hebrew teach that it reads that way. There is no reason to believe that God did not write it. In fact, Jews and Christians alike believe that God wrote the Bible, and that He chose parable as one of many media in which to do it. And why shouldn't he? After all, Jesus used parables often when he walked on this earth. If we believe that Jesus is God incarnate, why would God not also use this medium to communicate with the children he loves so much?
So since Genesis 1:1 opens with the ancient Hebrew equivalent of "Once Upon A Time," we know that it is a myth, and it has no intention of being any more -- or any less -- than that. God, in these first few verses of the Bible, is not trying to tell us "when" or "how" He created Heaven and Earth. He is telling us Who and Why. As others have said, long before the theory of evolution was even a concept, scholars accepted that Genesis was not intended to be taken as literal or historically accurate. It was written, by God, as a grand parable, and anyone who refuses to accept that is denying God's intentions.