The first link shows a 7809 (the 9 means nine-volt output). The other two are 5V outputs. I would go with the third (100uF/10uF/100nF) version here, but really anything would work --> not much ripple to filter from a 12-14VDC input from a car. If the source was AC power through some diodes, one might get fussier and read the exact parts' datasheets to get the recommended values.

EDIT: Eg, here is the datasheet for a Texas Instruments 78L05 chip. Refer to the top of page 11 for recommended capacitor values (0.33uF and 0.1uF in this case).

And here is the ST Microelectronics version, again recommending 0.33uF/0.1uF (page 2).

The further the regulator is from the source of power, the larger the first capacitor. Or at least that's what I have read in other datasheets.

Cheers!