So, I’ve tried that and it works perfect!
So 1) is fixed.
and 2) also almost fixed.
But only almodst.

As written, I’ve connected the Coin1 button, but in MAME it doesn’t work.
Same for the Exit-Button.
I’ve attached the Exit-Button to 2B.

Any idea, what I must change or where I must connect it?

General: Are there any shortcuts for other keys? Example: Using iPac2 a shortcut for Exit was pressing Player1 together with Player2…