Here's some jobs that I've had around that age that paid well, and some tips for getting them:
-Paper route: Go to your local newspaper and ask if they need paper carriers.
-Caddy- go to local golf course, and ask if they have caddys. Normally only nicer ones do.
-Farmhand- go to local farms and ask if they need help doing manual labor. I worked on a tobacco farm growing up.
-Cook/dishwasher- go to local restaurants and ask if they need help.