Zombie cash and spawn?

So, i have did a zombie character and animation, two things that I couldn't handle (I did not make the script so please you can try and help?)

1. The zombie when killed gives Cash to the player who did the action
2. The zombies spawn every single wave, they don't spam spawn or else the server will get crashed If you have an idea about what I'm talking about, share your ideas down below!

You are sadly requesting a script, which is against the rules. But, I could help you.

What you need to do, is make sure you have the animation script to make it play, and when the zombie dies, make it so it adds onto the leaderstat value.