Help with my Samsung Galaxy 4 please?

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http://forums.androidcentral.com – Hi there Ive arranged my pages as I like them, yet every day new apps that I havent downloaded just pop up on my homepage and I was wondering why this is? Also I get a message every single time I try to move something that says "you can resize widgets and reposition widgets and shortcuts' etc etc. How do I remove this? And one more question- how do I make the font in play books bigger? Thanks for any help. Im brand new at The Android and abit confused after using an iphone for years. (HowTos)