please help me out!

I cannot help with the sound or webcam issues at this time. But for your floppy, you need to go to the system folder, find the floppy icon, right click on mount. As with windows the OS has to be told to look at the device before it can announce the new data.

now for your other items:

to setup the desktop effects you need to need to configure compiz to use your chosen animations and effects, I recommend recommend installing the compiz configration manager and the simple compiz configuration manager, the names are not exact, I am trying to remember the names.

To have the cool MAC style icons at the botton you can install caito-dock, this program will have to setup as a startup application if you want it on the screen by default.

To run windows or another OS within ubuntu you want to install VirtualBox, this will allow you to install any OS as a virtual machine, but with the windows OSs you will have to have a physical copy of the disk and the proper licensing to install, treat it as a second computer.