Tidy Up Theme Help

Need to make this theme actually look like the theme demo.
Also need to alter these certain things in the theme:

* -remove settings button
* -remove payment options
* -add social media links
* -some extra color customization options
* -guidance on how to add images and text into the correct places
* - change colors, mainly of menu
* -making the links to pages at the top in menu take you to another place down the page rather than another page
* -replace logo with website name or my own logo that I make
* -get video slider to function as appears in demo

Can anyone help me with this?

It would be so greatly appreciated!! It is for my amazing Dad. He's always been there for me, I wanted to give back and took this project on for him, but it turns out it's been a bit more challenging than I thought, and I'm hitting a time crunch as his election is coming up real soon. It would make his day if you can help me achieve these items. Thank you so so very much.