Will an iPhone 5/5s case fit an iPhone 5C?

I'm getting a new phone because my 4S got water damaged and the screen broke, and it's more financially viable to get a new phone etc etc.
I'm getting the 5C in yellow, but I still want to put cases on it. All the cases I see are for the 5 or the 5S, will they fit onto a 5C? The 5C looks to be the same size as the 5S, so would the cases fit?

What are some cheap iPhone cases?

I need to find an iPhone case for me and my boyfriend; can you please send links for cases that are under $10 and also please not too girly, not too boyish, just in between so we both like it:-)

What do I do with a water damaged iPhone 5?

Today I got caught in a monsoon without an umbrella and my iphone was in my pocket. When I got home, it was still on, but unresponsive. I shut it off and put it in a bowl of rice. I checked it several hours later and the apple logo was slowly blinking on the screen (and I can still see water under the screen). I have not plugged it in to the computer or attempted to charge it.
The phone is about one year old, but back in February I cracked the screen and had it repaired by a non-official retailer, so I think the warranty is shot.
Is the phone totally done for, or can I save it somehow?

2GB of internet- how much can I use before it runs out?

I'm upgrading my iphone and found a contract of 2GB of internet per month. How much can I use 3G wise before it runs out? I have unlimited at the moment.

I tend to use Wi-Fi most of the time so that won't use my 2 gigabytes will it?

When on 3G I use games that use the internet (like 8ball pool), Facebook, twitter and occasionally YouTube.

So basically would doing this take up all of my 2GB or data?

IPhone touch thing settings?

IPhone touch thing settings?

Added (1). when I touch somewhere on the screen i touch somewhere else?
like when i'm writing a text and i press h i press g instead? How can i fix this?
i know how you fixed it in ios 6, but that doesn't help since i have ios 7.