A star's "life cycle" depends mostly on its initial mass; everything is determined by mass. Small, low-mass stars may shine essentially forever, while very large high-mass stars may grow old and go supernova in only a few dozen million years.
No; stars are not, to the best of our knowledge, "alive".
Massive Stars.
Massive Stars.
No, stars have life spans.
No, but some stars end their life by becoming a black hole.
stars live for about ten billionyears
Stars are suns and cannot sustain life. Earth is well, earth, and it CAN sustain life.
main sequence stars
The massive stars turn into gas
Suns
White dwarf stars are theorized to be the final evolutionary state of all stars that did not become neutron stars. This stage is the longest in a stars life outside of black dwarfs which are white dwarfs that have cooled dramatically.
10 billion years or less if stars collide