The same thing happened to my Amazon Kindle Touch 3G.After about 50 times trying over and over for about an hour it said "Please connect wirelessly to download the latest Special Offers" I plugged it in the computer (I usually use the wall charger) and after it downloaded it, the Kindle started working fine.
yes
you need a wi-fi connection. the kindle fire has built in wi-fi.
you cant
There is no such thing as the nook fire. The Kindle Fire however has only 3G The Nook has both options.
Kindle prices range from $139-189. The $139 one being the Wi-Fi, and the $189 one being the 3Gs+Wi-Fi. Nook prices range from $149-199. The $149 being the Wi-Fi, and the $199 being the 3Gs+Wi-Fi.
No - the Kindle uses Wi-Fi to download content from the intenet.
The third generation Kindle is cheaper than 250: you can get the K3 with Wi-Fi for $139 and the Kindle with 3G and Wi-Fi for $189. You can add the "special offers" Kindle, which is the Wi-Fi version (normally 139USD) for $114. It basically means you'll get ads on it. The Nook is also cheaper than 250 USD now.
You sure can! Just connect to the nearest Wi-Fi network and open up the browser before navigating to your email account. There are likely email client apps available for the kindle fire that will make the process even faster.
You don't ! The Kindle is equipped with Wi-Fi - you don't need a router to download content !
if you pay for wi-fi you can use it to surf the web and even play games online
No - each model is equipped with Wi-Fi capability - you don't need a router.
You have to be able to make a Wi-Fi connection from your network. You might be able to do this with a Router. We have cable internet connected to our desktop computer and had to get a Wi-Fi Router in order to make Wi-Fi connections with a laptop and Kindle.