Yes you can connect your wireless and USB iMac keyboard to PC or other iMac's. If you want to know how there are some videos on YouTube to help you do this.
If it is a wired keyboard yes. If it is a 'bluetooth keyboard then it might connect with a Bluetooth Device plugged into your PCs USB port.
The wireless keyboard is not backlit that comes with an iMac but you can buy a backlit keyboard.
Older iMacs use a USB keyboard which plugs into a USB socket on the back. Some newer iMacs use a Bluetooth wireless keyboard. These need to be turned on by the switch at the right hand end. A light indicates if the keyboard is working. If the light flashes it means that the keyboard has not yet connected to the computer. (See links below)
Alt is Option on the Mac keyboard.
The iMac is an all-in-one computer. The monitor and computer are all in one unit. The only other hardware you need is a mouse and keyboard.
First off the keyboard must be a Bluetooth keyboard such as an Apple Buletooth keyboard. Secondly you must have Bluetooth turned on and it must be discoverable. To turn it on and make it discoverable click System Preferences in the Dock and then choose Bluetooth from the screen that comes up. There you will see ON & Discoverable. Click each box and then close out the screen. Turn on your Bluetooth keyboard and it will pair with your iMac.
yes well the desktops do the laptops don't a keyboard for a mac is us$79 and the mouse the same i personaly don't like the new key board it doesn't make a solid ticking noise.
The iMac comes with a built in webcam.
There is none on the keyboard.
Apple
Yes, Apple has a line of desktop computers that were introduced to the public in the year of 1998. The Imac is Apple's line of consumer desktops computers.
The best you can buy.
1993