You can use it in the store for many things. You can buy skins for champions and permanately unlock champions themselves with RP. You can also buy rune pages, player icons and ward skins.
If you just want RP codes you can get them at dolphincodes but you gotta be quick!
Stock up some rp and wait for it.
RP Injector is a phishing tool designed to scam people out of information/money. It's neither allowed in conjunction with the game nor should you attempt to use it.
Yes I can
Subscribe to riot games' youtube channel and make sure you use the same e-mail as your League of Legends account. http://www.youtube.com/user/RiotGamesInc If you just want RP codes you can get them at http://www.dolphincodes.cu.cc but you gotta be quick!
Launch the game and sign in Click on store click on purchase RP Follow the directions
It is done via Paymo. The points can be purchased in the client under the Purchase RP section.
RP means Riot Points
Keep in mind, there are no hacks in LoL. All of the ones that are out there are scams and viruses that can hijack your accounts.
If you mean skins (There are no "hats") you can purchase them with RP, or Riot Points. These are points purchased with real money either at a store on online. You can find them in the card area at a gamestop or other store. Online, you can find a place to purchase RP.
You don't delete League of Legends. League of Legends deletes you.
No, you don't have to. I am max-level in league of legends and have never paid a dime. Many do, however, buy things called RP which can be used to purchase champions (characters in the game) and skins (makes them look different). Other than that, everything is free.