Newbie first time setup help

[Gumdropghost]

Hi pachitalk!
I finally got my first machine,
a Kyoraku Makotochan in a Big Bang frame

s-l1600.jpg

I am having a few issues:
First off, I can't find any sort of volume control if there is one - if not, can someone point me to a good guide for installing a volume control?

Second of all, it screams at me with a loud alarm whenever I plug it in! Which is the biggest issue here. I've seen that an alarm for Kyoraku machines is "normal" but I'm not sure how long it's supposed to last. It's louder than a car alarm, should I just let it go and hope for the best?

Also I have 100 balls, should I buy more/where is the best place to buy them?

Sorry for all the newbie questions, thanks guys!

Harvey