Your attitude stinks.
Do not sell yourself short by telling all of us that you do not have the skills to create a laser show or put together a simple system. If you set your goals that low, you will have hard time with this hobby, and perhaps a harder time at life in general
I was 15 when I started putting together my first "real" light show projector for home use. The spirograph and mirror-on-speaker type systems started a few years earlier with a small Hene laser my dad bought me for Christmas, and it paved the way for important lessons that have helped with all laser projects since then.
Start small, Dream big and it will pave the way to an amazing hobby that will bring you a lifetime of pretty colors, late nights and empty wallets. It has been almost 22 years since I turned a laser on for the first time, and the magic is still there.
It took YEARS of planning and work to build a proper laser system to be able to even watch laser shows in my parent's living room. I went to laser conferences to learn and network, and I worked for a couple of the pioneers of this entire industry as a roadie. Sometimes I got to push buttons too! The lasers back needed more electricity then your parents house, and needed large amounts of water to cool them. It's easy in this day and age compared to when many of us were getting started, I hope you realize that.
Some of the PL members that lurk here created and designed some of the technology you will learn about in this hobby. There are even a few members here that remember ME from when I was even younger than you are. Do more research, and hook up with your local PL members ( we are everywhere) to learn learn learn. Steve ( Mixedgas ) taught me electronics over the phone when I was a teenager.. Now that we have emails and PL, I bet he and many others can help you too.
Work hard for a couple years saving every penny and build something you would be proud of. I've bought some damn expensive gear but nothing is as satisfying as the stuff that I built by myself. Your parents should support your passions in life, and cash poor or not, they will if you show true dedication and a strong effort. I have found that it really is true - help comes to those who choose to help themselves first.
You could build a single color scanning system with a simple abstract/spirograph console for under $250. That would be a good first step. I bet most teenagers could save that amount in a single school year with good planning and strong dedication.