+1 on getting the disconnect tool - makes it easy peasy to remove the #7 & 11 lines hooking to the #10 cooler (which you shouldn't need to replace). Check out Starless's DIY in the Wiki to see if the overall job is something you'd like to tackle.
I replaced all four lines (#1, 3, 7 & 11) & the reservoir. Aside from the pressure line, they're not terribly expensive. Don't forget washers & hose clamps.
Make sure you get the correct #3 pressure hose, for either the LF-20 or the LF-30 pump. Going just by the car's manufacture date isn't wise, as an LF-20 could have been replaced by an LF-30. To be sure, take a look at the pump pictures on Pelican Parts (or another vendor) - they're quite different.