To play an audio source you could use the HandleEventWithAudioExample example component, as shown in the Spine Examples/Getting Started/2 Controlling Animation example scene.
There is no way without coding involved on the Unity side to spawn a particle effect though. You could ask your programmer to prepare a simple script that provides your desired event logic, so that you can easily test your setup.
In any case, you should add the events in Spine to trigger the desired reaction by handling the same event on the Unity side.
