What cost will occur in my interior decoration if I will follow the interior design ideas given in a magazine?

I was reading an article about interior design ideas in a magazine and I was really surprised to see the pictures that were given there in the article. It was so amazing that I really want to follow those ideas and decorate my home to give the exact look. But before going for this I want to know what will the cost of decoration my home if I will follow these interior design ideas. Do you have any idea?