There are no motorcycles in vanilla (normal) minecraft
The only vehicles are minecarts and boats
You can't, unless you know how to use command blocks.
Try running it as an administrator and make sure you have the latest minecraft launcher and the latest version of java.
Make sure your console is connected to your TV via a HDMI cable. Without that specific cable, Minecraft will not allow split screen.
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
Yes, the motorcycle is not street legal and they did not make many
You launch it from wherever you saved it to.
I didn't make Minecraft.
Putting your clay into a motorcycle shape
Download, portforward, and run it.
Check your internet connection.
Yes it is
Well, you can maybe google minecraft alts. Some of them are actually working. 80% do not work.