Howdy mate,
The yarga 9 seems to be a pretty good allround kite. My mate just bought a 05/06 9m Yarga for a few hundred, although his came with lines.
He's a beginner and couldn't ride upwind until he got the Yarga.
The extra attachments are for setting up a 4-line bridle but I've only ever seen the 05/06 Yarga setup as a 5-line setup. Maybe you can hang glowsticks to it and go out kiting at night

Any 5-line bar and lines will suit the kite. You will need to tune the length of the 5th line tho.
Overall it seems to be a good kite. I were a little concerned with the build quality tho. It looked like an old 02' Naish build not a 06' build quality, however he hasn't had any dramas yet.