I'm not sure how to approach this to be honest. Firstly we need to establish the default position.
Is the default position to believe these things are false until proven true? Or true until their proven false?
Well, for some of the list you had, like some of the miracles, I would argue that those miracles wouldn't be too difficult for someone (God) who created the universe.
Plus I would rather claim ignorance.. Because I certainly didn't mean to mock or cause offence.
Oh ok, I just assumed you wouldn't have wanted to claim ignorance. My appologies then.
Well I'll go with the talking snake first.
Could all snakes talk at that time? Or just that snake? And if just that snake... Why?
People will point out that it's a serpent, and not a snake. Regardless, that distinction isn't too important to what we're talking about.
When you first listed it, you listed it as talking snakes (plural), to which I thought was mockery, because I've had atheists tell me that they found a snake in their backyard and it didn't talk to them, therefore Genesis is false. That's the sort of mockery I was getting at, but I can see you aren't like them, so I'll take this seriously. As for the mockers, the Bible makes no claims about talking snakes (plural), it references a singular case (kinda like the donkey talking).
Anyways, the most common (and rational) objection I see in regards to this is, "why did Adam and Eve carry on as if a talking snake (serpent) is normal?" This is a very valid question, as I would be freaked out too if an animal just suddenly started talking to me. I will offer you 2 possible and logical explainations, which could go hand in hand, or it could be just one of them and not the other.
1. Adam and Eve were literally born yesterday (or even sooner). Therefore, they weren't alive long enough to establish any precidents as to what was normal or not normal. So how could a talking snake or serpent seem out of the ordinary to them when there was no ordinary?
2. Adam and Eve did view it as out of the ordinary, and there was much more to the conversation than what we have in the Bible. This one is a bit more of a hypothesis than anything else, but there is credibility behind this concept, for a couple of rather obvious reasons. First, the ancient Hebrew writing itself. The stuff they wrote back then was written to be short and to the point, becasue writting material and people with the ability to write were scarce. Second, it's rather obvious that people said more than what was written in the Bible. Take for instance the prophet Samuel. Do you think the words written in the Bible were the only words Samuel ever spoke throughout his whole life? That would be nonsense. I believe the same is true of some conversations in the Bible, and that the authors, due to scarce writting materials (and maybe some other reasons), only wrote what was most important in regards to what conversations we see in the Bible, and even then some of the conversations might be summarized rather than having the full conversation (I get the feeling a lot, especially reading the OT books, like Samuel - Chronicles).
Or is there some other objection you would like to bring up?