HTC Magic :: How To Delete Shortcts That Have Placed On Extra Home Screen?

I have been reading this thread for a few days now alongside the vodafone one.I have had my phone for almost 2 weeks now and think it is really great, although one or two things annoy me especially trying to get used to the keyboard.I was hoping someone would be kind enough to help me with a few issues please.

1. I am not very techy and dont really understand a lot of the jargon used but would like to know the difference between 3g and wi fi and how do I know what I am using.

2. How do yo know how much memory your phone has and if you can add any more. I am frightened that all the photos, applications, videos, contacts etc etc that I will use too much memory.

3. How do yo delete shortcts that you have placed on your extra home screen.

4. How does this gprs thing work is that like having a sat nav?

5. How do yo get your hotmail to be sent to your phone I cant seem to work it out without have to just go to google type in msn hotmail then sign in that way.

6. My bluetooth doesnt work.