1. The Bible is a collection of Near Eastern, mainly Semitic, folklore and mythology, laced with a not too generous portion of actual history.
2. Of course the Bible should be read. Historically it has been one of the most important tracts of the human race. More wars have been waged and more atrocities committed in the name of the God of this book than for any other motive. We owe it to ourselves to know what it's all about.
3. Bible doctrine? Well, beyond the so-called Golden Rule there really is no clear-cut doctrine. The wording in the book leaves doctrine open to individual interpretation.
4. How could the Bible affect someone's life? Good question. I have no idea how other people may react to a study of ancient myths. For myself, it has affected my life in that it has caused me to think rationally about things I might otherwise not have given much notice to. It's always good to have a focus for the exercise of one's mental faculties.
5. Not sure how to understand the question. How do you apply something like that to real-life situations? I don't know.
Btw, in the interests of full disclosure, I do not consider myself an atheist. However, I certainly do not believe in the so-called God that's at the center of this Bible any more than I believe in Zeus or Jupiter or Odin. I also have no use whatever for organized religion of any stripe. So, perhaps, my answers are acceptable for your project even though I reject the 'atheist' label