I havnt read the manual as my board has not arrived yet. (also im very new to building pc's)
Could i run the computer with just the alrady included built in graphics or do i need and extra one?
1) You can read the manual online; that's how I got it.
2) You cannot use the built-in graphics. Short answer: the motherboard doesn't have any.
Long answer: This motherboard uses the P67 chipset (the chipset is chips on the board that allow the CPU to connect to everything else). The P67 chipset does not support built-in graphics. Hence, no built-in graphics.
The H67 chipset, which is not on the board that you are getting, does support built-in graphics but does not support any kind of enthusiast features. They're planning a chipset sometime soon (I would have said a "fusion" chipset, but that's taken these days) that will support both.
But. Your Motherboard Does Not Have Built In Graphics. Honest.
That said, welcome to the world of building your own. Read a lot, ask questions for what you can't find by reading, and learn from experience. Have fun.