yes
The sun is one of an estimated 400 billion stars in our galaxy.
Large stars are distributed all over our galaxy, there is no single location for them.
It has been estimated that there are between 200 -> 400 billion stars in the Milky Way Galaxy
between 200 and 400 billion stars
A galaxy is by a definition a group of stars. If there were no stars it could not be a galaxy.
A dwarf galaxy might contain this number of stars. A galaxy will contain billions of stars.
Every galaxy contains stars, if that's what you mean. "Galaxy" means "big bunch of stars". No stars ===> no galaxy.
A typical galaxy may have anywhere between a few million (106) stars, and over a trillion (1012) stars. Our own Milky Way is estimated to have between 200 and 400 billion (2x1011-4x1011) stars.
That means matter between stars - mainly dust and gas.
Elliptical Galaxy The Elliptical Galaxy has mostly old stars and blue stars are new stars.
Nebula
A galaxy contains billions of stars. A universe contains billions of galaxies.