Eohippus A. (we actually are back to this designation from Hyracotherium) had four toes on the front and three on the hind. Technically the oldest ancestor designation is vague enough that the answer could be none, since the oldest ancestor of all life had no limbs.
Horses have vestigial remnants of toes in the form of splint bones on their legs. These vestigial toes are no longer used for weight-bearing or walking, as horses have evolved to stand and move on a single toe, known as a hoof.
Over time, horses have evolved to be taller - the original 'horse' from just after the extinction of the dinosaurs was about the size of a beagle. Also, horses used to have five toes. Over the millenia horses have dropped from five toes, to three, to the one seen today.
Prehistoric horses were much smaller. The horses we see today have one toe ( the hoof) and a remnant of another (the chestnut). Horses from that time had multiple toes, and as they evolved, they had less and less toes. To answer your question, that would be no. Horses in these periods are much faster that they were then.
Horses eriginated in chins about three hundred years. The first horse was small and dog like with three toes. As time went on the toes turned into a hoof.
Horses do not have toes, they have 1 hoof on each leg.
Over time they evolved from having normal feet with toes to having hooves, better suited for running in their habitat.
Eohippous (probably not the right spelling, but that's what it sounds like) was the first horse. It had it had three toes in the back and four in the back. Over time, the toes evolved into the modern horses hoof. It was about three feet tall.
Millions of years ago, horses had three or four functional toes that left prints similar to those of other browsing mammals. Over time, these toes evolved into the single hoof that we see in modern horses today.
Though you can only see what is called the "hoof" at the end of each leg, horses, like all mammals, started out with five toes. The modern horse currently stands on "tip-toe" on the end of the toenail of the middle toe. The other 4 toes have become vestigial due to the process of evolution. The two outer toes are completely gone, but the other two can still be seen as the "chestnut" and "splint" higher on the leg.
toes
Modern horses evolved from perissodactyl ancestors (hoofed mammals with an odd number of toes). One of the earliest ancestors of the modern horse was hyracotherium. It was more or less the size of a terrier and had odd toes but no real hooves yet. Which each successive species the middle toe got larger and larger while the four other toes got smaller, and that is how modern horses have one big hoof on each foot.
Toes