"I don't take all Bible stories literally, but I do for the resurrection"
This isn't specifically a question for inkyfingers but how do you decide which parts of the bible are metaphor/parable and which ones are literal truth?"
Some bits of the bible are not even claiming to be true, whereas others are.
Jesus told parables, for example about a good samaritan. It's unlikely that there really was a good samaritan, and it doesn't matter either way cos the story is told to teach us a lesson, not to teach us historical facts. Similarly, parts of the old testament are stories with a lesson, rather than historical truths.
However, much of the bible claims to be history, including the accounts of jesus' life in the new testament. I don't think we can pick and choose which of these we believe, especially with regard to the resurrection.
The resurrection is central to Christian belief (if you don't believe in it then you're not Christian - that's what separates Christian belief from jewish/muslim/sikh, etc.) Christians believe that the resurrection actually achieved something - because of jesus' death and resurrection our wrongdoings can be forgiven. If the resurrection isn't true, then Christianity is meaningless.