ok so normaly i play support or ap mid but after today i had to play top and i have no real tanky chars im wondering if any 1 could recomend a good tank char and how to build the runes and the masteries please and thank you

Garen is really new user friendly. All you really need for him is HP and AD.

Try mabey Nidally, or Olaf. Nidallys toss is amazing, and olaf is just a damage dealer

Garen is fun, totally stomps late game.
Same with Olaf, dive dive dive their carries!

Chogath is good up top as well, nice sustain and a true dmg ultimate that scales with ap