He will need something to back up onto like an external hard drive. The disks are necessary if the hard drive needs to be repaired, you can't repair the boot volume so you need to start up from an install disc and run Disk Utility from there. When you talk to him have him resettle SMC and pram, sometimes unexpected shutdowns can be corrected that way. The freezing is another issue, I'm concerned with the health of his hard drive. Another thing to ask when you talk to him is how much total space and how much free space does his hard drive have?
To reset the SMC
MacBook and MacBook Pro
Laptops with a battery you can remove
Shut down the computer.
Disconnect the MagSafe power adapter from the computer, if it's connected.
Remove the battery.
Press and hold the power button for 5 seconds.
Release the power button.
Reconnect the battery and MagSafe power adapter.
Press the power button to turn on the computer.
Newer Mac portables with a battery you don't remove
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
Resetting NVRAM / PRAM
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.