If your using Turbo C, you're pretty much stuck in DOS. But you can run programs inside that magical wonder called DOSBox.
I recommend learning graphics using the old Denthor VGA trainers as translated into C by Chris Mann.
ftp://ftp.scene.org/mirrors/hornet/code/tutors/denthor/
Then, once you understand all that, then you're ready for the good stuff.
Get an Orwell Dev-C++ install and download libSDL. You'll love it.
(Orwell Dev-C++ and libSDL are both easily googled.)