{Rakdos keyrune} if thats been in play for more then one turn does in suffer summon sickness to be a creature?
No: as long as it has been under your control continuously since the start of the turn, it will not have summoning sickness, even if it didn't start the turn as a creature.
Cool thanks, is it the same for lands that get turned into creatures by sorcery or others? Basically if i have a card on the battlefield and it gets turns into a creature and ive had it since the start of my turn, its not bothered by summoning sickness?
Correct. Summoning sickness only cares if the permanent has been under your control since the beginning of your turn. Everything else is irrelivent.