if you're new to C++, I don't know if the SCI Studio source code would be the best place to start. I haven't looked at it to know for sure, but I think it was written with the Borland libraries and probably will not compile under Visual C++. I would recommend starting out with console programs at first and avoid dealing with third party libraries, because they'll probably just confuse you as a beginner (e.g., when writing a program with MFC, you don't even write the main function yourself).
I don't know of any good free references, although you could probably find some if you did some Internet searches (google.com group search tends to come back with lots of results on programming stuff).
If what you want to learn is how to write Windows programs, then probably the best Visual C++ resources are Programming Windows by Charles Petzold and Programming Windows with MFC by Jeff Prosise. However, these are definitely NOT free.
I can point you to a decent C/C++ standard library reference at:
http://www.dinkumware.com/htm_cl/index.htmlbut I usually use the books I mentioned and the msdn library for just about everything I need to know anymore. I've also got a book called C++ in Plain English by Brian Overland, which is what I learned the C++ language from. The current edition has a good C++ language reference, including descriptions of all the operators, keywords, and standard library functions.