Jonah was a prophet. He was called by God to go to Nineveh to preach to the people there. But instead of obeying, he tried to run away by boarding a ship going in the opposite direction.
Yes, it is. The movie 'Mid 90s' draws from Jonah Hill's own experiences growing up in the mid - 90s. It gives a somewhat autobiographical look at that time period in his life, including the skateboarding culture, the relationships with friends and family, and the general feel of being a teenager in that era.
Whether the story of Jonah is real depends on one's religious beliefs and interpretation. For those who adhere strongly to the religious text, it may be considered real. However, for others who approach it from a more critical or secular viewpoint, it might be seen as a symbolic tale with deeper meanings rather than a literal occurrence.