How to get the seats in my car looking brand new again?

I have a 2005 Ford Focus and the seats are a tan and you can clearly see little stains and even big ones. I want to know if there's an easy carpet cleaning fix I can do myself that's not so expensive or even if anyone knows a car wash or anywhere that does inside cleaning and making your car look like new again would be great!

Most car was places have interior cleaning

Many, many products available… Some sort of an extractor device like a carpet/upholstery machine might be more effective… And if the seats haven't been cleaned in the car's 10 years, I doubt if you'll get them to look brand new.