How far away is the whole solar system away from the sun?

Answer 1

The solar system is an entity which comprises:-

• the Sun
• The planets
• The asteroids
• The Kuiper belt
• the Oort cloud
• and the comments

As it contains the Sun it CANNOT BE far away form the Sun, your question is pure nonsense.

Answer 2

The solar system extends outwards from the sun for about 4.6 billion miles (7.4 billion kilometers) to the outermost known planet, Neptune.