No, you can't pair garmin GPS with another one, but you can pair your garmin to a cell phone using blue tooth. There are also other devices to which one can pair a garmin GPS.
A GPS is a navigation system used to help find your way. It connect to a satellite in space and gives directions to your preset destination. It is mainly used in cars for driving.
Yes, you have to be able to connect the unit to a computer using a serial port (or serial port with usb adapter). You download the webupdater app for the unit from the Garmin site and run it. It will...
A normal Garmin comes with a car charger and windshield mount (suction cup), all you need do is plug it in and find a spot on the windshield that will not interfer with your vision, this is normally...
The price of Garmin GPS accessories depends on the merchant you buy them from. Ebay is a good place to look for inexpensive accessories. Also, you can check with the manufacturer.