before u tone ur muscle, u must have good amount of muscle mass first.
if u don't have muscle, then u should do lower reps with heavy weight.

common belief is that higher reps with lighter weight is good for toning up muscle. however every individual is different, it may not work for u.

so i think the best way is to experience urself. see how ur body response to the workout...

copied from the book "Burn The Fat, Feed The Muscle"
Strength/Power 1 – 5 reps
Hypertrophy (size) & some strength 6 - 12 reps
Local endurance/ little size 12-20 reps
Abs & Calves 10-25 reps

regarding sets, general rule is 3 sets per exercise (not including the warm up sets).

BFFM set guidelines
Advanced:
Large muscle groups: 9 -12 sets per body part
Small muscle groups: 6 - 9 sets per body part
Intermediate:
Large muscle groups: 6 - 8 sets per body part
Small muscle groups: 5 - 6 sets per body part