If you want to learn html and php google is the best source. However I suggest you start first with html as its easier to understand. Another easy way to make a website is using Microsoft Frontpage/Publisher. Then you can practise by getting a test website hosted by free hosting service like geocities, freewebs, angelfire, etc.

To actually make money with your website, you have to be creative and attract people to visit your website. For example, think how google makes a lot of money even though every/most service they provide is free. The answer is ads. If you can constantly attract people to your website, there's a chance they will click on the ads there. Each click = cash for you.

Hope this helps