Skoda New Model I Have SKODA FAVORIT Car Model 1994, What Is The Oil Quantity That Should Be Put?

I have SKODA FAVORIT car model 1994, what is the oil quantity that should be put? - skoda new model

I kind of car SKODA FAVORIT 1994 I bought told me that some people, if you change the oil, I need all 4 liters (3.5 liters instead of savings than in most vehicles) without replacing the filter or not.
My question is: Is it true? If so, you should use 4.5 liters if you use the filters? "I think that 4 liters is a lot cheaper than I changed the filter, what is your opinion? Thanks