You need to be 18 years old or over and you need to have a verified Paypal account. You also need to make your ebay account a sellers account (you can still use it to buy). This involves a quick process where they check you are who you say (includes an automated phone call)
For everything you need to know about ebay check out this site, http://www.squidoo.com/ebay-site
I just know that there is a book called 'Selling on
eBay for Dummies'. Didn't look inside.
Look on ebay's help pages. Loads of info for novices.
You have to connect it to your PayPal account which in turn must be connected with your bank details. Then also you must have a postal address an email address and any other details you would normally need.
What requirements are their. For an eBay account