Bill likes to look at pictures
The standard Bell set of replacement cables will work fine - $6 at Wal-mart. There are "better" cables out there, but most of us can not tell a functional difference.
You will need a cable cutter - these are hard steel cables, so a properly hardened tool is required. I have a Craftsman diagonal cutter that works well, and I have other Craftsman diagonal cutters that do not work at all.....
* a wrench to fit the bolts that retain the cable on the brakes.
* pliers to pull and hold the cable tight while you tighten the retaining bolt.
* light oil to lubricate the inside of the housings
* if your bike does not have quick release for the brakes, a third hand (clamp) to hold the brake pads against the rim while you do up the cables is nice to have.
You NEED new brake pads. Kool Stop are among the best.
Consider replacing the brakes with modern dual pivots. The difference in braking power is amazing - one a budget, replace the front first.