What kind elemental chakra have the 4th Hokage?

Answer 1

Kakashi explains that there are five basic types of elemental chakra - fire, wind, water, lightning and earth. He pulls out special cards which react differently to each person's chakra. It will burn if fire, split if wind, crumple if lightning, turn to dust if earth, and turn wet if water. Naruto flows his chakra into the card and it splits, indicating he has an affinity to wind. Kakashi explains the wind type is very well suited for combat (in essence it is the strongest in battle) because of its ability to "blow past anything and slice things to bits."

Since The fourth is Naruto's Father, this would lead that his offspring would carry on his inherited traits, i.e. wind chakra. :-) It has also been said that Naruto's type of ninjutsu is similar to that of his mothers, Kishinu Uzumaki. By that fact and that if the parents are same/similar nationality there is a 75% inclination his biological traits are similar to his mother but since hes a boy I'd lower that to 60%.