we're talking ancient history here, but i started working part-time in a restaurant when i was 16. started as dishwasher, busting my butt. wanted to ride a bike from rhode island to mexico. finally got enough money and bought a bianchi. i'm still riding it 34 yars later. had the frame chromed and repainted (professionally for a change) a few years ago. it still has the oringinal brakes (universal) front and rear derailleur (campy nuovo record and grand tourismo), hubs and rims, stem, handle bars, seat post, rear rack and fenders.
this bike is my oldest and bestest friend (excuse the grammar).
for your birthday, maybe your folks could open up a savings account for you. that way you could get a bit more at christmas too.
try settling for a real beater for now, till you can save up for a nice bike. put an add in one of those free newspapers, put notices up at laundromats, supermarkets, church, etc. i'd bet there are enough people with their or their kids old bikes in the garage who wouldn't mind getting rid it. also, try the dump. see a bike at a garage sale but got no cash. how about doing their lawn "x" number of times instead?
also, don't give up on getting a job. i eventually worked my up in the restaurant business to head chef at a number of restaurants. believe me, i'd rather hire a 15 or 16 year old who shows some ***** over your average high school senior who's only interest is calling in sick so he can go out cruising and trying to score. apply and do the interview scene. expect "sorry" for an answer at first, but keep going back on a regular basis. determination will get you a job.
by the way, sounds like WP33 is doing fairly well in the bike department these days. maybe he'd let you have one of his bikes if you fronted the shipping. LOL