IPhone shows a Wi-Fi signal but Internet won't work?

So whenever I'm at home, my iPhone says I can connect to my Wi-Fi and it shows three bar things. However whenever I go on to safari or and Internet requiring app, it never loads. Says can't connect to the page.

I can have working Wi-Fi in public places, vacation homes, and at my own apartment but at my old house or my parents home, my Internet will not load despite the fact it says it's connected to Wi-Fi. Everyone else in my family doesn't have this problem but ever since I moved out and use other wifis, I can't connect use my parents Wi-Fi

I have a iPhone 4S without iOS 7, I think it's still the old iOS 6 something

My iPhone charger breaks every time I plug it in?

I'm getting really angry. I have already bought 5 chargers but once I plug them into my Macbook Pro they just stop working, even if I take it out and plug it in to one of those wall plug things or car plug things. Should I get a new one and just not plug it in to my laptop?

Two songs on my iPhone that I can't delete?

I just got an iPhone today and there were songs on my cloud that I didn't want, so I turned off all music from settings>music. But there are two songs that I never downloaded onto the device that still play when there's no Wi-Fi and when airplane mode is on. I really need them off because one of them is from an old kids bop album I bought when I was a kid. If my friends see that they'll kill me! I can't delete them either but I can delete other songs as I please. Any info will help, thanks!

How to manage my music to get iOS 7 on my iPhone 4S?

I have to transfer my purchased my music from my phone onto my computer and then delete it off my phone to make room for iOS 7 (I need 610 MB for the update and I currently have 170 MB). How do I delete music off my phone and how do I make sure it's on my computer on my iTunes library? Then how do I sync it back?

PS. My father's music somehow transported into my iTunes library even though he doesn't have any Apple products and I want to make sure it doesn't get synced to my phone after I do the update, is there any way to make sure that doesn't happen?

What is a good portable power supply for a pc?

I have a Mac mini and a monitor, along with an iphone and speakers, what would be a good power generator/rechargeable box that has 4 female ends for wall outlets. I need something like this for trips