showing hidden files

To show hidden files in Finder, enter the following two commands into a Terminal window (press enter after each line):

defaults write com.apple.finder AppleShowAllFiles true
killall Finder​

To hide hidden files in Finder, enter the following two commands into a Terminal window (press enter after each line):

defaults write com.apple.finder AppleShowAllFiles false
killall Finder​

I recommend caution when dealing with system files. If you're not certain what you're doing, it's best to leave them alone.

 

There are some utilities you can use to do this easily as well
OnyX, DesktopUtility and TotalFinder are a few

 

What exactly are you trying to accomplish? It might help to start with that.

 

I'm not an expert, but I'm gonna guess that has more to do with being incompatible than being hidden

 

That's not the way to migrate iTunes from Windows to your Mac.

iTunes: How to move your music to a new computer