How do you use the Teleport Command in Minecraft?

I have tried to use this ******* command 4 times and it doesn't work. I've tried to use the stupid block but for some reason that doesn't either and I have tired to look for the folder to enable it but google wasn't helpful and neither was Planet Minecraft. I don't want to use the command block. I just don't like it.
Can anyone please help?

Teleport only works if you are on a server with Admin powers, or Commands allowed.

You'll have to be in creative mode and in one of your own worlds for this to work:

/tp @p [insert x coordinate] [insert y coordinate] [insert z coordinate]

I'm in a new world on creative with cheats active. I don't know the y coordinate. Just x and z.
I have tried the (/tp @p [insert x coordinate] [insert z coordinate]) code too.
So what am I doing wrong?