I believe that Adam and Eve were real people, possibly survivors of some previous catastrophe like the flood, possibly the first two people in the sense of "first such as us", as opposed to neanderthals or hominids. There's some sort of a story there but there's too little information to really know much about it. The story of the flood at the time of Noah is real as the article above describes; nonetheless the idea of God visiting the flood upon the Earth as retribution for man's sins is not credible and is clearly an invention of a later age. The flood was a cosmic disaster which we simply got in the way of and which nobody, including anybody in the spirit world, was able to prevent.
We have one example of a fairly new planet (Venus) in our system and we know what it looks like and, since neither our own planet nor Mars looks like that at all I assume our planet is considerably older than the 6000 years once deduced from biblical chronologies; nonetheless I know of no reason to buy into the kinds of time frames which evolutionists and astronomers are so fond of. In particular, American Indian petroglyphs and oral traditions strongly indicate that Indian ancestors dealt with dinosaurs on a regular basis, and that the 70 million years which supposedly separates our age from that of dinosaurs is a white-man's fairytale. Literature (midrashim) indicates that there were a handful of leftover dinosaurs kicking around just prior to the flood, and the real hayday of dinosaurs was probably 10,000 or 30,000 years back, but not 65 million.