To run this model, press the Play button on the toolbar in the model window. Initial conditions are loaded into the model workspace from the sldemo_suspdat.m file (open this file to view its contents). To see the contents of the model workspace go to View menu > Model Explorer, look under the contents of the sldemo_suspn model and select "Model Workspace". Loading initial conditions in the model workspace prevents any accidental modifications of parameters and keeps MATLAB workspace clean.
Note that the model logs relevant data to MATLAB workspace in a data structure called sldemo_suspn_output. Type the name of the structure to see what data it contains. Read more about signal logging in Simulink Help.