Have you checked the requirements? I certainly don't think you'd be running high settings with older hardware, but being an mmorpg, it's probably possible to run on a dual-core and integrated graphics on low.
What are the system requirements for the game?
AMD Athlon 64 X2 Dual-Core 4000+ or better
Intel Core 2 Duo 2.0GHz or better
Windows XP or later
Windows XP: 1.5GB RAM
Windows Vista and Windows 7: 2GB RAM
Note: PCs using a built-in graphical chipset are recommended to have 2GB of RAM.
Star Wars: The Old Republic requires a video card that has a minimum of 256MB of on-board RAM as well as support for Shader 3.0 or better. Examples include:
ATI X1800 or better
nVidia 7800 or better
Intel 4100 Integrated Graphics or better
DVD-ROM drive – 8x speed or better (required for installation from physical editions only) Internet connection required to play.