few questions for the hardcore arrive users

[infamous757]

i been playing with this phone for about 3 days and i have 2 of many questions i have about this device and even after researching them i still couldnt find an answer

1. how do u close open apps? it seems like once u open them they are always open and hitting the home button takes u back but when u reopen the app its like it was never closed. wouldnt this make your battery drain quicker if u had many apps open?

2. is there a pure solid way to get custom ringtones without ruining your phone?

thanks!