If you're asking about sauces for pasta, tomato sauce and Alfredo sauce are actually pretty easy.
Chop up some onion and garlic and cook it in a couple of tablespoons of oil until they soften and you can smell the garlic. Add a can of tomatoes, some basil, salt and pepper and simmer for 30 minutes. That's a pretty basic sauce. You can adjust the seasonings if you like. You could add a little thyme or oregano. Chop up some mushrooms and cook them with the onion and garlic, etc.
Alfredo type sauce is easy as well. The real deal is just butter, parmigiano reggiano cheese and some of the water the pasta is cooked in. Many add some heavy cream to make it even richer. You could also add some garlic if you like.