if i have more than one Barbaric card in my staging area can i use the ability more than once?

with thunderfoot can i play this at the beginning of my turn every turn and if i have more than 1 can i use the abiliy more times?

You can use as many Barbarics as you like but after the first one resolves it's ability will stop the others from doing anything.

You can use Thunderfoot every turn, and as many of them as you have.