Need more detail. The 5 schilling coin from Austria had a picture of a Lipanzzer stallion with a man riding it (and the words "Republik Osterreich" around it), but there are probably hundreds of coins with horses and men.
No
Centaurs - half man half horse.
horse
Except for the year and the unusual spelling of Edward, you are describing a sterling silver Crown (Five Shilling) coin. The man on the horse is possibly St. George in the act of slaying a dragon. The only Edward VII Crowns to be minted were dated 1902, the year of his Coronation. The coin/token/medallion is most likely a souvenir from the 1908 London Summer Olympic Games which were opened by King Edward VII. They were produced in quantity and possibly have very little value.
Hoof.
Any man to appear on an American dollar coin was a U.S. President.
the man killed by the horse
No, but a leek and a dragon have.
The Triumphs of a Man Called Horse was created in 1982.
Blind Man on a Flying Horse was created in 1986.
Man versus Horse Marathon was created in 1980.
Nothing. The phrase is "man about the house" not "horse".