How can we remove the "bottom bar" (that has all the icons) in Mac OS X? :
Also, is it possible to move it to the left or right side of the screen like how Windows taskbar does it? :
What do you mean by "bottom bar"? The dock?
Hiding the dock
Version 1 - Hiding
By pressing alt+cmd+D you hide it (works also by clicking "Turn Hiding On", see below). It will then disappear but reappear when you move your mouse over the Dock area at the bottom.
When hidden, application windows take up the full space, so maybe this is just what you're looking for.
Version 2 - Making it really small
If this isn't enough, you can also go to Terminal.app and enter:
Then the dock will be so super small that you won't even notice it. If you hide it then, it won't get in your way. There will be just a very tiny area that you have to hover over to see it.
Version 3 - Removing it entirely
There's a programm called DockDisabler, which is supposed to remove it entirely.
Warning: This may break some things so I wouldn't recommend it unless you know what you're doing.
Moving the Dock to the side of the screen
Just right-click the dock these stripes you see on the right, and change the position.
Note that all of these commands can also be accessed from the Apple menu (under Dock), or in System Preferences → Dock.
This one works for me (in OS X 10.8):
It makes Dock wait long enough before show up.
You can't get rid of the Dock entirely, but you can get really close. This method is completely safe and will not damage your computer. Enjoy
Done, your Dock won't show up unless you hold your mouse at the bottom of your screen for 20000000000 seconds! And if it does, it will be puny.