Ok, step one. Get a CD with at least 8 songs. Make two or three of them covers, but have the rest originals. Make sure you have at least one cover, this shows the listener what kind of music you are and what they can expect from your CD. Making CD's is simple, look it up on the web and you will get step by step info.
Next, talk to your local stores and small businesses and ask them to place you CD's somewhere in the store where they are willing to sell them. At the moment, don't worry about making a lot of money. Hell, if it comes down to it, tell the owner that he can keep the profit. You may walk out of that store with no money, but your name and your music is starting to get out there.
Start playing bars and clubs. Very easy way to get your names out there. And a bunch of drunks wont really care about how you sound. As long as it is catchy or hardcore they will be into it. And who knows, you may be given free booze outta the deal.
After a while, make a radio friendly song. This means a song that isn't super head bang. Something more mellow, but catchy. Don't make it to intense or complicated. Keep the lyrics clean and meaningful. The easiest way is to write a love song. Those are almost golden. Then, go talk to your local radio station. Ask them to play your song. If they don't, continue getting credibility from selling your CD's and try again every week or two.
Once you get airplay, things will change. Bars will be asking for you to play, take every gig you can! I can't stress that enough. Then, start talking to some small bands that go on tour, or want to go on tour, but they always open for someone. Tell them that you will open for them. They will jump at the idea of being the main attraction, and once again, your name and fame is getting known.
After doing some of these, you will be making money. Other hints I can give you are, try and get merchandise, T-Shirts, Posters, Hats, ect.
Good luck to you, and keep the music alive. I hope I have helped.