You can't get a curved shape on minecraft. Everything is squared.
check out minecraft wiki it has everything you will ever want to know about crafting sequences.
no you can't. I've tried EVERYTHING! I just don't think you can.
everything
Its kind of hard to say but click on this link to the minecraft wiki. It will tell you everything you need: http://www.minecraftwiki.net/wiki/Tutorials/Setting_up_a_server
You will have to rebuild them.
In my opinion minecrft is fun. You can play with friends, make your own server, make huge kingdoms, and everything you could dream of in blocks.
Download it off the minecraft forums. Then drag everything in the file into the minecraft jar on winrar, or 7zip.
I didn't make Minecraft.
You can download different Texture packs to make everything, (ground, blocks, buildings, etc,) look anywhere from cartoonish to real life.
Re instull Minecraft
Infinite, as everything in minecraft. However, they are quite rare, and it is easier just to trade for them.