I would recommend looking things over and making a decision. Usually I'll do the line that's leaking and the one next to it that I end up hurting while doing the first line. Never do both at once..that's crazy talk
If you think you'll end up doing a bunch, hit the parts store and ask for the bulk pack of the fittings you need. The fittings at the wheels to the rubber brake hoses are one size which also works on unions and then the ones going into the master or ABS are another different size. Also ...my suggestion is the NiCopp line. It's super easy to bend, will never rust and makes install about 10 times easier/faster for a first timer. Also a nice double flare tool, got mine from Sears and it's been great for probably 50-75 flares/repairs so far. I'd tell you about a power bleeder...but I'd rather everyone was jealous.
