For the sport of sprinting or long-distance runs, how should I build my legs?

Anonymous
I want to get into the sport of running but I'm not sure whether I should build my legs like a body-builder (as in 6-8 reps) or do it partially (idk..10-12 reps). Wil the extra bulk affect my overall running performance? (I don't go to the gym but I have 2 dumbbells with interchangeable weights including 2 "2.5 pound" weights, 2 "5 pound" weights and 4 "10 pound" weights and the bars that support the weights for the dumbbell each have a mass of 5 pounds so the max amount of weight I can have on one dumbbell is 60 pounds but if I'm using both, I would have 32.5 pounds each. Basically I can do weighted calf raises, squats, lunges, lying hip abductors and this hip adduction exercise using this stability ball I have. I also train my arms using the dumbbells and my core using the exercise ball). Also is hill training and interval training a good way to increase strength in my legs? Will it also increase my endurance?
For the sport of sprinting or long-distance runs, how should I build my legs?
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