Windows (assuming windows but when asking a computer question its always a good idea to tell if windows/mac/linux/whatever) has rotate in as a keyboard shortcut, hold the ctrl and alt and then cursor keys, the up will return to 'normal', down will flip, left and right will rotate left and right.

Laptops and LCD's typically have one resolution to choose from since the pixel size can't change but can sometimes include other resolutions and scale the display.

Sounds like its missing the monitor definition (.inf) or video drivers, but you would need to give more details (windows, computer/laptop make and model).