Hello,
1) Theme Options > Styling > Buttons, Theme Options > WooCommerce > Single product builder > Add to cart settings
2) This problem will be fixed in the next update of the theme.
3) Do you mean title of the product on your home page https://gyazo.com/196d62d88a4c87557c53c5ca25bec11e ? There is no such option, unfortunately.
4) https://gyazo.com/b2213ae26965d3be93172cfbcfeae4e4
Regards