City assistant boss Arteta is closing in on a three-and-a-half year deal to return to the club he used to captain, with an agreement expected to be reached after City's Carabao Cup quarter-final tie at Oxford United on Wednesday.
Toure worked with Arteta for two years at City, and is concerned that the funds in north London could make life tricky for the new boss.
“It's going to be quite difficult," the Ivorian told Associated Press.
“All the time when you come in a new club which is struggling, you need the backing of your board to listen to you and do what you want. Obviously Man City have a lot more money than Arsenal and I think it's going to be quite complicated."