Off topic:how I connect putty between host computer and my lap top?

Question

[zizigolu]

Hi,

I found a host computer, I installed putty but I don't know how transfer my files to host computer and how for example install R packages on that computer. I googles but I found confusing clues. I know how to access with vpn but not putty. because by vpn I was able to inspect host computer but putty is just a black terminal neither start menu nor anything else.