Were to start?

right i have just started looking into lua code and have no idea were to start can any one help me start coding and learn to build good gamemodes, maps and much more for garrys mod…

Well for a start, read the stickies:
http://www.facepunch.com/threads/240374-Garry-s-Mod-Lua-documentation.-(GMOD-10-Lua-wiki)
http://www.facepunch.com/threads/792401-How-to-make-a-constructive-quot-help-me-quot-thread
http://www.facepunch.com/threads/868561-Need-help-READ-THIS-FIRST!

And mapping isn’t lua.

Not quite sure how you missed all the stickies.