I've been on Ebay for close to a year. All I had to give them was a valid credit card number and email. They do ask other personal info like phone number and such. If you are a seller, anytime you list, your ebay selling fees are billed to your acct once a month on whatever credit card you gave them. The fees depend on the amount the item costs, what category it is in, what kind of pictures you use, how long the listing is, and so on.
Setting up an account is easy. It took me a few minutes.
I hope this helped. If you have any other questions, please feel free to ask.
Mitch