Updated theme/how to edit home page

I recently updated my theme to 6.5.8 version on responsive auction theme.
https://celebrityresaleonline.com
Now I cannot find where to edit the home page.
1-how to add the slider that was on the home page (image 1)
2-where do I edit the text to right of the slider? (image 1)
3-where do I edit info on the home page (image 3)
4-how do I change the amount of images in recently added (image 4)

Thank in advance for your help!