Anytime a juror sees any type of literature before a trial about the accused, it will definitely effect how they feel about the accused no matter what the person does to not let it influence their opinion.
The second question will give a consultant the ability to tell the attorneys what type of people to try and get on their jury. For instance, in the OJ Simpson trial, the jury consultant for the defense instructed the defense to pick as many African-American women as possible, as their surveys showed that they were the most sympathetic to Mr. Simpson.