if it's tone ur looking for, u need to lose any major excess fat which could hide your muscles, aswell as bulking up the muscle(s). If u want definition in muscle, try takin Creatin Monohydrate from a healthfood shop, i've been told it 'forces' water in with the muscle, defining them. If u dont want to bulk up, lift a lot of a little; do more reps rather than increasing the weight your using. A set of dumbells, barbell and a bench will help you with your desired goal, rather than using only your body as resistance(push ups, pullups etc)