This star is a middle aged yellow star, much like our star, the Sun. It is actually a multiple star system and binoculars will reveal one of Capella's companions. Many stars are double and multiple systems. Some only appear double due to line of sight, while other stars actually revolve around each other and form a physical pair bound by gravity. There are a number of good examples of stars in the senior age status.
Stars can meet their ends in a few different ways all of which depend on one thing, their mass.
The more massive a star, the faster it evolves. Stars which are about half the size of the Sun burn up their hydrogen and then slowly cool down. These stars are not hot enough to burn anything other than hydrogen. Stars up to about 3 times the mass of the Sun have a similar ending but often blow off part of themselves to form a nebula around the central star. They they follow the path of the smaller stars and end up as cool stars called white dwarfs.