Describe the other players competing at the same position. This will give you clues as to what year you might be a starter. Find out how common it is to red-shirt and how that will affect graduation. Philosophies of strength and conditioning vary by institution. You may be required to maintain a certain weight.
Every coach has a particular style that involves different motivational techniques and discipline.
You need to know if a coach's teaching style does not match your learning style. For team sports, find out what kind of offense and defense is employed. For individual sports, find out how you are seeded and how to qualify for conference and national championships. Don't make any assumptions about how long a coach will be at a school. If the coach is losing and the contract ends in two years, you may have a new coach.