how do i get IP and RP

There are two ways I know of to get RP without paying out of pocket.

1. Enter a tournament with an RP prize
2. Use the Bing Rewards system to get Burger King gift cards, and exchange those for RP in the store.

For getting IP you have a few options.

1. Use your recently gotten RP and buy an IP booster
2. Play a lot of ARAM's. They're short and fun, so you can grind without it feeling horrible.