Hello,
1) Check now. You can edit layers position using Revolution slider settings https://prnt.sc/wkzxvi
2) Check now. You can edit slider responsive if you want to improve it https://prnt.sc/wkzso9 Read the Revolution slider docs https://www.sliderrevolution.com/faq/responsive-content/
3) Edit the home page using Elementor. Edit the Products element and it’s bg image position https://prnt.sc/wkzq5t
4) Enable loop, autoplay in the element settings if you need that https://prnt.sc/wkzrly
Regards