Random math about ip
Playing 10 games a day at 30 minutes a game and(estimating here) 80 ip per game would be, (80 x 10) + 150(fwotd)=950 ip a day. Which is 5 hours a day. Dividing total ip by the days would be, 876,570/950 = 922.705 days divided by 364(years) 922.705/364 = 2.5 years to unlock everything with out boosters.
All champs
450=5,400 total ip
1350=28,350 total ip
3150=75,600 total ip
4800=168,000 total ip
6300=201,600 total ip
Total=478,950 total ip
All runes= 397,620?(got from wiki)
Grand total=876,570
(Disclaimer: i'm not that good at math so i could have failed really hard so let me know :P oh and this ain't a rant about how much everything cost)