Solar system began as a large rotating dust cloud. Explains 1 and 2 above. Cloud cools and contracts. Can use the analogy of a figure skater to explain how cloud spins faster as it contracts. Eventually spins off rings that agglomerate into planets.
Big problem is the presence of all the angular momentum in the planets.
Sun should be spinning faster. Collision Hypothesis - Begins in same manner as above with gas cloud cooling and contracting. Passing star yanks tongues of material from the proto-sun. Problem is that an expanding gas cloud should overcome the gravitational attraction of the Sun. Recent Theory - Revives nebular hypothesis.