Questions for Apple Support

I saw somewhere that in addition to the Applecare that I took out, I am also entitled to 90 free days of questions (by phone I think/hope).

Here are some of my unresolved questions so far:

1.  When you are on a page, how do you go back easily to the page you were just on (other than hitting the Home button)?

2.  How to make the battery last longer?  What settings can I click off (and on when needed)?
     The teacher at the Apple workshop said to put the phone on Airplane setting when on the subway: says it stops the phone from searching and searching for towers.  Then of course you have to remember to turn it back on at some point.

3.  Wonder if I should turn off the phone completely at night or just put it on Sleep?
 Or turn on airplane at night?

4. Any way to speed up the downloading of photos?  Much slower than the wireless Bluetooth I had with my Nokia...oh how I miss that little nothing phone....(think Smiley)

5.  How do I set up security so if phone is stolen, thief can't read my email?

6. Is there an alarm click on the iPhone?
    Would the alarm clock ring if I turn off the phone at night?

Above is some of my homework....