I had an allowance, which was readily witheld if I didn't do my chores. But I also would get a little extra money (like, an extra dollar) for the really hard chores, like shoveling the entire driveway. Which was very long.
I started babysitting pretty regularly in 5th grade, and then I got a little recording contract in 7th, which lasted a couple of years. I also picked up work serving at my parents' friends' dinner parties. I still remember my mantra...
serve from the left, clear from the right... LOL
My parents gave me lots - I was very lucky - but they always made sure I appreciated it. They were very careful to teach me to have a good work ethic and to know the value of the dollar. It was funny, they never really wanted me to work (my dad grew up quite poor, and "pulled himself up by his bootstraps," and I think he didn't want me to work if I didn't have to), but I really wanted to, so they encouraged it, as long as it didn't interfere with my studies.