Heres some info from Naruto.wikia.com
Iruka umino
Background
Iruka's parents were killed twelve years before the start of the series defending Konoha from the Nine-Tailed Demon Fox. His family gone, Iruka thereafter became a prankster, trying to gain attention and stave off the loneliness. He...
Naruto isnt exactly turning out like jiriaya, he's more like the 4th now.
Plus the 4th wanted naruto to grow up like the protagonist on Jiriayas first book.