i need help of some expert here, am new to platform. Please your answer to my question wil be great help

Firstly, is it possible for many people to pay for the same expired domain name... If yes what wil happen to other people money as only one person can manage the domain name

Secondly, pls enlight me more on these 3 terms
Domain name in auction sales
Domain name auction ending in less than 24hour
Active auction

Backorder domain name ending in less than 24hour

After successfully buy a expired domain name, do i still need to pay to host it

How can i put my advertisment since it is ordinary domain name without website

Pls i need answer...

Thanks.... More hints

Waiting for more response

Gud evenin