Probably a black one! :)
Most likely an Appaloosa
he rode a buckskin horse
a Buckskin Quarter Horse
Potting soil.
a pony
Quarter horse.
Tennesee walker or warmblood...Depends on what kind of security and were at.
Appaloosa
To avoid skin getting trapped under the strap witch could cause wounds
Witch's ride broom sticks as there transportation to get other places.
you ride a minichre horse like someone would ride any other horse
I believe he was a gaited Arabian or possibly a thoroughbred, anyway he was a beautiful horse.