Just got my first Mac and it's a Mac Book Pro. I am new to Mac's and a computer novice on top of it. I cannot figure out how to set it up to run on my old Dell 19 inch monitor, my HP deskjet 5550 printer, or my canoscan n650u scanner. I know I need some other cables and stuff, but which ones. I bought a printer cable that has the big pronged end and a usb end on the other end to plug into my Macbook, but still not working. I'm sure there are some other issues I need to work out. Any help would be greatly appreciated!