Cleaning inside a car

Au
So I need to really detail the inside of my car. The previous owners have spilled so many drinks and had pets in there. So there are a ton of stains on the floor and seats, and hair is everywhere. What're some of the best ways to remove the toughest stains from seats and floors? I don't have leather, but I can't describe the seats. It's a fabric, but not a really soft fabric, if that makes sense. Nothing fuzzy or whatever. Forgot to take a picture for y'all. Please help, I'll be washing it tomorrow and need to know soon. Thank you