If your goal is to reproduce in ANSYS what you did in MATLAB, then you need the same things, a mass for the wheel and a spring between the wheel and the car and a spring between the wheel and ground.
In MATLAB, you have a 1D model, so you don't need to worry about the 6 Degrees of Freedom (DOF) that each body has, but in a 3D model in ANSYS, you must control five DOF if you want a model that behaves like a 1D model in MATLAB. One way to do that is with a Translational Joint, which takes away five DOF. You can have a Translational Joint to ground on a Wheel body. Then you can have a Translational joint between the wheel and the Car body. Add a Spring to Ground on the Wheel and a spring between the wheel and the car body and you will have replicated the 1D MATLAB model in ANSYS.
However, in ANSYS, you can easily simulate in 3D and have the car body pitch and roll as each of the four wheels has a different input.
What is the goal of your project?