How many IP to "unlock the whole game"?
Decided to do a little math crunching... and this is what I came up with (with much help from reddit)
tier 3 runes-
3@1029max=2754 15@2059max=27675 32@4109max=118080 15@8209max=110700
also, rune pages @6300*18max=113400
champions- 12@450=5400 22@1350=29700 24@3150=75600 39@4800=187200 32@6300=201600 0(currently)@7800=0
Quintessences- 5@5153max=7725 16@10253max=49200 12@2050*3max=73800
current total is 1,002,834... HOWEVER, IF YOU FOLLOW riot on youtube, twitter, and facebook, that is alistar, tristana, and garen for free, 1350,1350, and 450 ip respectively, leaving your total at 999,684
so if anyone says it'd take like... "A MILLION IP" to unlock everything, no... it only takes 999,684, until Aurelion Sol comes out...
Edit: this does exclude all cosmetic content, special events, discounts, ect.