How much space is left on my hard drive? Where do I have to go to find out how much space I have left on my hard drive?

As you can imagine from the question I am new to Apple and don't know where to look.

I used a program called "Cleanup" on my old Windows machine which did what the name says, great little program, is there anything similar for Apple, something which cleans up files like cache and cookies?
 Menu > About this Mac



Then the Storage tab



For cleanup, CCleaner exists for Mac; there's also CleanMyDrive &amp; a whole raft of others. I wouldn't particularly recommend any of them, as they've all been known to throw out the wrong bit, just like on Windows.