bootloader pro mini clone

Wondering if the pro mini clones would have the bootloader installed?

How do I establish whether it is installed or not and how is the bootloader installed..??

http://www.ebay.com.au/itm/Mini-Pro-Compatible-Nano-Atmega328-5V-16M-Replace-ATmega128-Module-For-Arduino-/271454574839?pt=AU_Gadgets&hash=item3f33f418f7

If it has a bootloader, you might see the L LED flash regularly. You should be able to upload a sketch.
If not, you can follow this guidance to install the Uno bootloader, using connections to the SCK-MOSI-MISO-Reset-Vcc-Gnd pins

or get an AVR ISP MKii and install that way. I do a lot of parts and I use a MKii.

Thanks Crossroads.....I'll follow up on your links.