Tt's called "Switcher" and you can customize the way the shortcuts with the mouse or keys work. I have it, is really useful.
It is actully freeware http://insentient.net/
If you want themes you can download some from: http://zeusosx.deviantart.com/.....D-79282673
For the cursors and Icons you should download whatever pack suits you better.. me, i spent days after them!.. and still AM after them!
As for the bar you can download Object Dock or Rocket dock, whatever suits you better.
Icons are highly customizable, you can download them or do your own ones (just save them as .png.. I do my own sometimes =D.. but of couse I am a graphic design student, so you may want to download them! XD)
The app to make buttons be on left, is called "leftsider": http://www.descargarlo.com/718.....Sider.html
I recommend you to use Tune up Styler, or Styler or Windows Blinds to install themes and icons and all without much of a drama
aaaaaand.... I dont know what else to come up with.. I think that's pretty much all there is to it, there are some apps that do what the "mac taskbar" does but I'm not sure how it works, I installed one once and it didnt seemed to work properly so I uninstalled it, it wasnt actually that useful..
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