Try looking in a plains biome, that's where they spawn the most.
Check on websites such as planet minecraft or other sources to find the latest survival servers that have been pinged and work.
Just look up Minecraft Servers and search for 'Survival'
They are found in plains, in version 1.6 and above.
there are no natural horses found in minecraft =0
There isn't horses in normal minecraft, but you can however ride a pig by putting a saddle on it. If you have seen anyone have horses in minecraft, it may have been a mod!
No, horses aren't yet part of Minecraft, but they will be as of 1.6 and beyond!
yes, it is the survival island from minecraft
Minecraft has two genres: Sandbox and survival
Minecraft Classic and Survival mode (singleplayer and multiplayer can be played on the browser but it may be faster if you download it. [You have to pay for Minecraft survival but you don't have to for classic]) I'll post more games when I find them, but Minecraft is the best game in the world in my opinion.
There are many Minecraft Survival Games server. The best one I think is CraftRealms(hg.craftrealms.com).
No.
Horses in Minecraft eat hay. This can be made using wheat. You can also feed them apples.