Sure, if you're some stick thin dude who doesn't work out like warlock (if you don't work out, why are you even in this thread giving out advices?) then push-up is a great exercise and will give you an extra kg of n00b muscle, but when you can do, say, 40 push-ups, with ease then you gotta move on to heavier weights.
You don't get "toned" doing high reps. That's a load of sh!t. The "toned" look comes from having some decent muscles and low body fat - the latter being the key.
Heavier weights & low reps don't necessarily translate to mass either. Mass comes from your diet. Muscles don't come from thin air.
foxy, try doing dumb bell flys & side plank.