You will need to find music for the score, and import it into your session. Then, you will synchronize the action on the screen with sound FX already provided.
Markers are common in all high end programs, and essential for synchronization.
So far, we're just making some basic sound FX, nothing fancy. You can now change the volume of the track. You can now pan the track left or right. It's a chase scene, so pick music that reflects the mood. It had the tense mood I was after, and I have a really good recording of it.