For the sheets and halyards you'll want to use low-stretch sailing rope. As long as it falls into that category you can pretty much choose based on color. For the tramp rope you can either use the same low-stretch rope ($$) or you can use a $4.99 50' rope from Wal-Mart and get comparable results. For docking lines I like the stretchy colored ropes you can get from Lowe's or Home Depot. (Usually they're in a big cardboard box in bundles of red, blue, brown, or green.)
"A little crazy but with big balls."