Quote: "Ok so i pressed the forum button on leadworks site and it got me here. I don't know why tbh. What does leadworks have to do with 3DWS?"
The link goes here since the Leadwerks engine and 3D world studio are created by the same developer, no other reason really.
Quote: "Is it just a world editor? I supose the engine part makes it a series of tools to allow us to create games but using what? c++?
"
What you buy - the Leadwerks Engine SDK - is essentially a set of tools for programming a game. It is up to you what you program in, although the most popular supported languages as far as I know are C++ and BlitzMax. The SDK comes with the .dll and header files you need to use the engine in these languages.
The tools include the Leadwerks sandbox (which can be used to place objects and lights within a level and edit terrains; to put in the game etc.), a model viewer, and material editor (for entity textures and stuff like that) among a few other things.
It is not like 3D World Studio, you do not make levels with the Leadwerks - although to a limited extent level design can be done with the Sandbox.
Quote: "
What previous knowledge of direct x programing would i need to know?"
None, for the graphics side of things you would only need to learn the LeadWerks engine commands and get used to the programming language you choose (e.g. C++). I should also note that Leadwerks uses OpenGL.
Quote: "Being a TGC product is it so far fected to try and make it integrated with dbpro even if only as a world editor? Is it any good?"
Well in reality, TGC are only reselling it, it has not actually been made by them (it has been made by "Leadwerks", the company with the same name as the engine). That is one reason why there is no integration with other TGC products. The other reason for no possible integration would be bad compatibility.
I would say Leadwerks is good

When you get to grips with it, and if you have a high end PC; it is rewarding to use.
The 3DWS board is not that active so I would reccomend these forums,
http://forum.leadwerks.com, anyway I hope that answered most of your questions