For a first-time house buyer, how much money do you need to start out?

I am 22 years old, all I have is my life savings of 35,000 at least. Would that be enough to start out or is the deposit itself expensive. I have no idea how this works? Help :/
Update: I am in UK, London.
Update 2: And I don't have a job. I am still a student. :/
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