How to set up auctions for MY domains only. Visitors can only bid on them.

This is my first PremiumPress theme, and my first WordPress site, so I have a lot to learn. I’m watching the videos and reading all I can, but I’m also eager to have my Auctions website working. I want to use the Auctions theme for selling my domain names only. I want visitors/members to only be able to bid on my domain names.

1 – How do I make it so as Admin I’m the only one to be able to post/submit auction items, and how do I remove the “Submit” button, etc.?

2 – I don’t want a header image at the top since I’m only selling domain names. How do I replace the header image with a text box where I can explain about the site and how to use it, etc.?

3 – I would like to list many domain names for sale with a different minimum bid amount for each name. Then when someone bids on a name, it then becomes a live auction for 7 days. Can this be done? If so, how?

5 – Does the Auction theme have a feature for immediately emailing bidders when they are outbid so they can bid again?

6 – Will auctions be extended a specified amount of time when a bid is received within the last few, specified minutes of an auction?

7 – I don’t want/need a photo with each domain name auction listing. Is it possible to not have images with each listing? If so, how do I do this?

Thank you!