COROLLA 2006 antifreeze change

I will appreciate information to change the antifreeze liquid of this carolla carolla car, this car has the vertical radiator container and bring a purge plug in the right container, I opened this plug, but it came out very little antifreeze .... so I then disconnected the hose that range from the bottom of the radiator to the machine and also came out little liquid. With new antifreeze liquid through the upper hose disconnecting it from the radiator side because the side of the hose connected to the machine was very uncomfortable to disconnect it ... but they only entered like 2 liters ... so I have doubt if this amount is the one that carries or I need to do something to enter more liquid .... I hope your collaboration partners ... greetings ...