I've tried both the command line approach and the Microsoft "printdir" function, and neither is particularly user friendly, nor do they produce output convenient to reuse.
So here in my dropbox is "one I made earlier", a bit clonky, but it works (at least on my win7 machine); counts and lists files in a folder , and counts those with specific extensions (although not in the print-out yet). Home made, so the usual disclaimers!
Originally written in Blitz Basic - I think it may need Microsoft DX9 to be installed before it will run.
Just copy into the directory you want to catalogue - or preferably a copy of the directory, until you're sure it works - and click.