If you are playing minecraft on the computer, when creating a new world, clicking the "More World Options..." button will bring you to another section of the new world menu where you are able to enable the bonus chest, generate the world with a seed, turn on cheats, and enable generated structures (Dungeons, mineshafts, villages, etc.).
You should see the "World Type" button next to the "Generated Structures" button, and by default, it will be set to Default (normal world). Clicking it once will make the world a Superflat world, and clicking it again will change it to the Large Biomes world type.
Note that if you are on Minecraft: Pocket Edition, or Minecraft: Xbox 360 Edition, you are not able to change world types, because Default worlds are the only available world types currently.
Well there is one way to get into good worlds in Minecraft. Type in a seed.
Theres no 'type' of minecraft!
Click the button that says: World Type: Default, and it will turn into World Type: Superflat. Then create the world.
Minecraft/Runescape
On the PC when you are creating a world you can set it to Superflat world type in the world options.
There are two types of seeds in Minecraft: 1 - The Item you can use a hoe to tilt soil then plant a see their 2: World seeds are codes for a SAME world someone else has Like if you type lbp2 in the world seed thing you'll get my world BUT you dont get my buildings
If you mean how to make it a survival as a game-type then just start a new world and click on the button until it says: Game-type: Survival.
To get onto the Minecraft website you simply type "Minecraft" into googe
You go to run. Type %appdata%, then into the Roaming folder, into .minecraft, then saves, then pick the world you want to delete, right click and delete.
To generate a normal world in Minercaft. Go to the game menu, create a new world, and make sure the world type is on normal.
Yes there is such thing as the Ether World in Minecraft.
Well, if you mean as in ''creative'' or ''survival'' they are right there once you click create new world. If you mean texture packs you can download them off of minecraft sites.