Does changing the video card cost much or not?

I run my computer if i ped the specific requirement at the website advice me to change my video card , my video card is Mobile Intel(R) 945GM Express Chipset Family (Intel(R) GMA 950). the website also told me of this Video HW Transform & Lighting: Required - Yes , You have - No Vertex Shader Ver.: Required - 3.0 , You have - 0.0 Pixel Shader Ver.: Required - 3.0 , You have - 2.0 . Anybody know where to get this ?