How and where do i find the kingdom terrain thing?

[Naisha Shadowdancer]

Do you know the brick/stone things on the ground like dirt? Like used in the human kingdoms, Where do i find it?

 

[Pyrogasm]

There are different tilesets that affect which tiles are shown as available in a map. The ones you are looking for are likely in Cityscape or Dalaran Ruins.

When creating a map you can choose the tileset, or you can modify the existing tileset by going to Advanced > Modify Tileset. In the modify tileset dialog you can either change the whole thing or set it to custom tileset mode which allows you to mix/match tiles from different tilesets to get the ones you want. Note there is a hard cap of 16 tiles that can be used in your map's custom tileset.