The Brazilian made his comeback from injury during the Reds' 2-0 defeat to league leaders Arsenal at the Emirates Stadium on Saturday which has left them five points adrift of the Gunners.
"I call [Coutinho] my player, my best player, because I think he is amazing. He makes the difference," Toure told The Mirror. "This season he has been injured and when he will come back, I think he's going to be amazing this season, definitely. In training, he is one of the hardest to mark, definitely. I call him my best player.
"Suarez is amazing, too. When you have a player like that [Coutinho], you know that you have this magic and people haven't seen that yet and they will because he is young, definitely. In Suarez and Daniel Sturridge we have two of the best strikers in the world. They are amazing.
"I think when Coutinho came on in the second half it showed there's not much difference between us and Arsenal. The season is long. We all want to be champion. This is only November. They will have a hard time as well. The season is not done yet, definitely."
Liverpool host Fulham in their next game on Saturday.