The Magic is ace - I love mine.
Here you go:
1 -
WiFi = Wireless Network. e.g. home wireless broadband. O2 cloud hotspot, etc
3G = 3rd Generation mobile network, it's fast than 2G (that's 2nd Gen). It will only say 3G if a) you have 3G turned on and b) there is a 3G signal where you are.
If your WiFi is on and connected, there will be a symbol that looks like radio signal in the notification bar.
If you're connected to 3G - it will actually say 3G in the notification bar.
Ive sussed this now thanks for the explanation.
2 - Under settings, you can check how much memory you have, but it's far easier to download a free app or widget from the Market so you can see it in a way you like and understand. Photos, Videos, and music is automatically stored to the SD Card, so don't worry about those taking over the phone memory.
Found it thanks, still got plenty left thankfully 
3 -
Press and hold the shortcut. You'll feel a vibration (don't let go!) The drawer will turn into a red trash can. Drag it to there. This WON'T delete the app - it's just a shortcut.
Excellent Tip My Homepage looks way different now and I can navigate much quicker.
4 -
I assume you mean GPS (GPRS is high speed mobile network). The true GPS is accurate if it can see sky. Mobile location uses mobile masts to triangulate an area you are in.
To use GPS for SatNav you need to download a SatNav App. What to see GPS work? Head outside, go to Maps, then menu > My location and what it zoom in!
Forgot to try this today but will tommorow
5 -
There is an Email App that isn't GMail or browser - I've not set it up as I'm a Gmail user. SORRY
I still cant get hotmail to work either now so I have decided to become a gmail user too
6 - Bluetooth does work..... but it's only stereo bluetooth. You can transfer files between devices like on normal mobiles!
Still cant sending pictures or music via bluetooth. The b shows at the top of the screen but when you go to a pic and press share it only gives you option messaging, picasa and google mail ??
A good app to download that will help with ALL of these and make life easier for you is 'Toggle Settings'
Done
Let me know if that helps.
Iain