I just want to know how to get LoL codes(on my own, I'm not asking for any). Also, I saw a post mention referals. If I get someone to start the game do I get goodies?
I think the codes are for in game items, that is my assumption anyway. If I'm wrong please let me know.

It depends on which referral system your on. If you're on the referral system #1, you have certain milestones you have to reach before you get a prize. As for referral system #2, every referral gets you an ip boost? (Can someone confirm this please?) and also for every milestone you reach, you get prizes like referral system #1 such as 10,000RP, medieval twitch skin etc..

Codes you can get everywhere. Some were even given even right here under giveaways. Pax skin codes were given away by riot in PAX and Riot squad singed was given away by Riot in every even they went.

And referals, you need to use your referral link to gain them.
With refer a friend 2.0 you get 250IP for when your friend reaches level 5 and for level 10 you get milestone rewards.

Program Points Milestone Reward
1 500 IP and Forum Recruiter Badge
2 500 IP
3 500 IP
4 500 IP
5 500 IP and a Rune Page
10 975 Riot Points (“RP”)
25 Warwick Champion, Exclusive Grey Warwick Skin, and a Senior Forum Badge
50 2,000 RP and Medieval Twitch skin
75 4,000 RP
100 10,000 RP and Master Forum Badge
150 + 5,000 RP awarded at 150 Program Points, and for every 50 Program Points earned thereafter

yes u do get goodies but since riot released refer a friend 2.0 smurfing isnt available since u wont get any goodies and maybe u will get banned