Krook lock is a lock that you put with your clutch and with your steering.
Its a steel rod with U shaped bends at both ends.
One goes in the steering and the other in the clutch pedal.
You can lock/unlock all the 4 doors by the button on the driver side window. (It is a standard feature in your car)
Security alarm means the remote you get along with the central locking unit by which you can lock/unlock the car via remote.
It also includes a sensor which causes the car alarm to sound if the car is hit by any thing.
No idea about the price of these items as its been quite long since I got a security alarm installed but it should be around 3~4k for the security alarm.
UG is the short for for the Upgraded Version.
This trim came with leather seat covers and the door panels had leather instead of the cloth used in standard models.