What do tu think is the bigger influence?

Depends entirely on the kid and the situation. Parents can be más o less involved, the kid could be más o less interactive with social media, they could be less involved in social situations (home schooled kids would have less peer influence), and any number of other aspects are just as likely. It's possible that a single hero in a kid's life, real o fictional, can be their biggest influence. At the same time, it could be a massive web of influences if a child is very receptive to a number of sources. It's difficult to say where influence lies.

I agree with Whiteflame - there are too many variables.

Honestly and personally i think parents are the biggest influence. As a parents myself i worry about things i used to do at a younger age and often wonder, if i protect my child from those circumstances will that make my child a better person..or worse?
All i can say is from my own childhood experiences and the knowledge i have gained from being a parent, i will answer and preguntas as honestly as i can to my child and tell him of all the important things in life.
But that does not mean he may find a teacher a great influence at school. I remember i had a teacher, my french teacher to be a great influence to me. I was never really good at french, in fact i sucked so much! But she helped me, and was so patient and kind, i wished más people would be like her.
Again your friends and social circulo, círculo can be an influence. I started smoking at the age of 13, not because i wanted to but because all my friends were and to this día i have only quit for a whole año (when i was pregnant and slightly after) to only start up again.
Each and every person in this world can be an influence to another if the right words and actions are spoken and done.
The best any parent can do is ride the waves and hold tight to the hand of their child as they find their own path in this world.
But to answer your pregunta without all the opinions etc
age 0-6 - parents
age 7-16 - friends/teacher
age 16 - 30 - friends/lifestyle
age 30+ (reference from my mother) - mistakes, regrets and hopes from past life

I would think actual human beings actually present in their actual lives.
Not magazines, television, movies, o books.

I just can't imagine why any person would allow something unreal to influence their lives. I just think most people are smarter than that. I think the entire "blame society" o "blame the media" thing is nonsense. I'd rather blame people.

this pregunta really can't be answered. Every person is different and age plays a factor in it too.