How can I install Safari, without a browser or itunes access? I do not seem to have Safari on my iPhone 4.  I also do not seem to have iTunes installed, or any access to iTunes.  I have tried resetting my home-screen layout, but Safari and itunes still are not there.  

I have tried to download the Safari install file to my PC, hoping to somehow transfer it to my iPhone.  But iTunes will not give up the file because I do not have iOS installed on the PC.

Any ideas, please?
As @Graham Miln suggested, it is most likely set this way in restrictions, assuming your phone isn't jail broken. Go to Settings -> General -> Restrictions and enable safari.

There is no way to install or uninstall Safari on an iOS device - it is a part of the operating system, nor is it possible to "have iOS installed on the PC"