Will IOS 9 make my iPhone 3 upgrade to an IPhone 6s?

I really like the iPhone 6s but my wife said I spent too much money at the strip club after I was grounded from spending too much money at the bars even though everybody knows strip clubs don't count as bars.

Is my Iphone done for? Or can i just get the screen replaced?

I have the Iphone5c, and it has been cracked for about a month or two. Well i dropped it today, and now the screen won't turn on. You can see a white line though, and you can hear it buzz when the charger turns on. Can i just get the LSD light fixed and the screen replaced and ill be good to go? Or do you think Ill have to get a whole new phone?

How to use a old iPhone 4 without going to the phone store?

So I have an android (I have for abut a year or two now) and I have been wanting to try something new. My brother has upgraded to a iPhone 6 from a iPhone 4, and I wanted to try it out for a few days. Is it possible for it to still work like if I put my email in or will it screw up his new phone if I turn it back on again?

Way of sending iMessages using Apple ID?

Okay so my iPhone 6 broke unexpectedly the other day and me being a 16-year-old girl it sucks, not going to lie. I'm currently on my old 4s which of course I can only use with Internet. I was wondering if there was a way I could send people texts over iMessage without using my phone number but my Apple ID instead; because my 4s obviously does not have a number. I've been trying to figure it out but haven't had all the luck.