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First to clear up some misconceptions:
The theory of evolution doesn't claim something was created of "nothing less". or nothingness, if that's what you meant.
Nor does it claim anything about the first atom, or that it was "created", that's a presumption that you're bringing.
Nor does it claim anything about the big bang, much less that it was an explosion, or it was 'by nothing',
Evolutionary theory explains the diversity of life on Earth and the distribution of traits through common decent. That humans evolved from earlier (now extinct) primates. Because of the lack of hard tissue, our current knowledge of the first animals is far from complete, but multicellular eukaryote life would have evolved from single-celled eukaryote life, likely flagellated. Not "from nothing".
You have a whole bunch of other questions, not relating to evolutionary theory. If you sincerely want answers to them, I suggest asking them individually, without couching them in some rant that they're impossible. Willful ignorance isn't a virtue. It's a form of lying.
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You are confusing the big bang theory, a theory in astronomy, with the theory of evolution through natural selection, a theory in biology. These are based on totally different data sets, and refer to totally different events: the evolution of the Universe, and the evolution of species on Earth. Both these theories are accepted as the best explanations of observed facts in two totally different branches of science, astronomy and biology.
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Which theory? If you mean Darwinism, then yes, that is a real, well accepted theory of evolution.
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If you really want to know what is behind the start of the universe, read A Universe from Nothing by Lawrence Krauss. And then if you want to know more about the scientific theory of evolution, find some books about that.