apple apps NO
As long as you have WiFi, yes.
You just need wifi.
Try to sync. If you look at the top of your kindle fire HD where it says the time scroll down and there is a little sign that looks similar to a recycle sign and under it it says sync. Click it and try to open your apps again. It worked for me
No, but it depends if you have data
no you dont but you do need it to download the games from the app store.
through wifi connection
It works on Kindle WiFi, but it's nearly unusable. You can check your documents and make small mods, but actually working on them is a real pain.
if you have wifi you can just download them off your ipod touch . if you dont have an ipod youch you will have to go onto itunes and go to apps and get free apps or paid ones .
No, to download books onto a Kindle from the internet, an internet connection is required. However, you can download e-books onto your computer and then transfer them to your Kindle using a USB cable without the need for Wi-Fi.
Only if the app you're trying to download is larger then 50 MB.
Yes you can. I have done it plenty of times. All you need to do when about to click purchase, instead of having it to download to your kindle do it to the computer, then use the USB provided to drag it into the kindle!
yes, the kindle fire has WIFI