The theory of evolution is a continuum, the tree of life, common descent, life from life, omne vivum ex vivo. It doesn't allow for life to pop-up other than on the tree.
Sure it does, it's just doubtful that it has on earth, and highly unlikely that it will on earth now that organisms inhabit pretty much everywhere and are ready to gobble up any organic molecules as soon as they are formed.
Sure it does. We just have lots of evidence that it hasn't happened in the last few hundred million years. We also have reason to believe that any chemistry that might move toward life would be consumed as food by existing things.
I am just amazed at the lengths you will go to avoid admitting that the quotation was fabricated out of thin air. I don't have time right now to detail how silly this quote sounds when attributed to Darwin, but here's a down payment:
The modern science of abiogenesis addresses a fundamentally different question: the ultimate origin of life itself. Pasteur had proved that abiogenesis was impossible for complex organisms. Charles Darwin's theory of evolution put forward a mechanism whereby such organisms might evolve over millennia from simple forms, but it did not address the original spark, from which even simple organisms might have arisen. Darwin was aware of the problem. In a letter to Joseph Dalton Hooker of February 1 1871, he made the suggestion that life may have begun in a "warm little pond, with all sorts of ammonia and phosphoric salts, lights, heat, electricity, etc. present, [so] that a protein compound was chemically formed ready to undergo still more complex changes". He went on to explain that "at the present day such matter would be instantly devoured or absorbed, which would not have been the case before living creatures were formed." In other words the presence of life itself prevents the spontaneous generation of simple organic compounds from occurring on Earth today - a circumstance which makes the search for the first life dependent on the laboratory.Source