Only if you want to subscribe for more features such as owning a ranch, but other than that, you can play Horse Isle completely free.
If you ever need help on Horseisle, I would recommend the Help Center on the website.
Depends on it's statistics/color/height/gender.
Elizabeth on Bone Isle will pay for 50 pinecones.
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.
Owning a club on HorseIsle 2 is completely free - except for purchasing the Club Token ($80 USD, or however much you pay in-game for a token!). However, if you throw club events or parties, you will have to cover any costs or fees as the game won't pay for those (or anything).
Acorns, I believe.
HORSEISLE ANSWER:SpiritEverPuppy-Brown Server
There is no actual way to hack into HorseIsle.
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.