Regarding horses, just as with the example of flies above, you have shown adaptation as each horse type adapted or through natural selection achieved a different species status in its environment, this is not evolution from one life form to another. These are genetic variances within the same genome.
No. It is exactly evolution. It's not all there is to evolution, which ultimately claims that common ancestry applies far wider than just to horses as a group, but it certainly is evolution.
Besides, you're the one who just upthread rejected "species jumping," but here you are now accepting that, yes, horses DID diversify into dozens and dozens of species.
These are genetic variances within the same genome.
No, it's what was originally, in the distant past, one genome becoming over time multiple genomes. Good biological species by definition have distinct genomes from other, even closely related, species. (Sometimes even isolated subspecies or populations do. A "genome" is the collective genetic complement of an interbreeding population of organisms.)
Furthermore, as I alluded to previously, nearly all the species in the horse family have different numbers of chromosomes. IOW their genomes are organized differently. (This is why hybrids between different equine species are nearly always infertile or have greatly reduced fertility.)