The number of planets, their spacing, and their individual masses is not necessarily repeatable in every planetary system. Life is too case-dependent to be a reliably repeatable phenomenon. The fact that our solar system has only one star is not a property that is duplicated in every stellar formation process.
Many systems have two or more stars that form out of the proto-stellar nebula.
The chemical abundance of the nebula from which a star forms is subject to minor variations depending on the amount of reprocessing that the material has undergone. Some nebulae may be metal deficient and this could affect the properties of the planets and stars that form from them. There are individual planetary properties that are found in the Solar System that include the backward rotation of Venus, the tilted orbital plane of Pluto, the retrograde orbital direction of some moons, and the highly tilted rotational axes of Uranus and Pluto. These properties are not necessarily duplicated in other systems since they are considered to be the product of cosmic accidents. Normal stars range in mass from approximately 0.1 solar masses to 50 solar masses.