As the name of the list suggests you have to train your horse a lot. If you want to get your on the list you need to improve the experience (exp) of your horse. To do this you can train your horse at a trainer, enter competitions, and ride it.
If you ever need help on Horseisle, I would recommend the Help Center on the website.
You need silver lining, moon beams, and popcorn.
acorns
You can do a quest on cat isle with them you'll need 10. :)
You will need to explore the map.
No, but if you intend to race or compete in competitions then you do need a number.
I will train you, Grasshopper.
Acorns, I believe.
Well,you need to get chose,so you might need to go to competitions.
HorseIsle's support email is support@horseisle.com. Remember only to use this if you need it. You can also go on the server page, and underneath the list of servers is a link that says Contact Us.
A lonesome train.