You can have 4 neopets on a single account.
there are many other websites like neopets, one is webkinz
There are many sites, one of which is marapets but the site isn't as sophisticated as neopets i think.
only one
There is no limit on how many pets you can adopt in a day, although you can only have up to four Neopets on one account.
up in the top right corner it says "create an account" click it
There are many neopets on neopets.com but from the day Octotober,10,2009 there are 257,647,898 at the time of 10:41 pm NST
You can't. This is one of the many useless items that cannot be used for anything really.
Neopets only allows you to have five accounts per email address. You are allowed one main account (in which you play games, have a shop, etc.), one guild account (only if your main account is the head of a guild and your guild account is allowed to have a guild shop.), and the rest are only supposed to have galleries.
neopets is a good one Icepets is like Neopets was when it began. Fresh and not as commercialized as Neopets. Friendly staff and great community.
About six
I am not sure but there are thousands
I am not sure how many days, but don't go on neopets for one week and then you you get back you pet will be dying