Pro*C, that is an Oracle product and nobody else's. To build programs using it you need to use Oracle's precompiler to convert Pro*C programs into ordinary C programs, after which you can compile it in the compiler of your choice -- assuming it has the correct libraries, etc. Which Turbo C does not. Instead, it has this:
Turbo C is a C compiler for DOS. Not "DOS prompt", but real, actual
DOS programs -- 16-bit .exe or .com files which can run in a vintage 1981
IBM Personal Computer. It's missing libraries and headers that anyone these days would consider standard; it doesn't even support
network sockets, let alone
Oracle, and hasn't been extant for nearly twenty
years. I don't know why people use it anymore.
For modern Windows alternatives I suggest things like
Dev-C++, or Microsoft Visual Studio.
If you can get just the Oracle client libraries that should have Pro*C in it, you don't need the full-fledged server I think. What licenses you need to use the client I have no idea.