The Milky Way similar to the graph of the sombrero galaxy NGC4594 - a disc shape of spiral galaxy, contains about 200 billion stars. In the galactic plane above and below a halo, including billions of years ago the ancient star formation. Generally, these ancient star contains less gold, platinum and heavy elements such as uranium, but new research shows that the universe was formed at the early stage, giant exploding spray into the space of the heavy elements formed the enriched new stars.
According to <studyisland.com>, white dwarfs are the oldest.
They are red giants.
Population II stars are the oldest in our Milky Way. Population III stars were the first stars in the Universe, but have yet to be discovered. See related question
The coolest stars are red.
The sun is hotter than red stars but cooler than blue stars,
According to <studyisland.com>, white dwarfs are the oldest.
No. It is just a knowing of a temperature. Red is cold, and blue is hot. Our sun is yellow which is the middle.
supernovas
Small red stars are called red dwarves. They are the least luminescent and coldest stars.
The oldest stars are now mostly either white dwarfs or neutron stars. A few of the largest may be black holes.
The largest and oldest stars are called Red Giants, although, some very small and incredibly massive stars, called Neutron stars, do exist. One tea spoon of Neutron star mater would weigh over 50 tonnes!
The large hot stars are typically called "blue-white" stars or also Blue Giants. Cooler large stars are called Red Giants.
Blue stars are the hottest, because they are newborn stars. Yellow stars are medium age stars, like our sun, and are right in the middle. Red stars are the oldest, and will explode very soon, so those are the coolest (but still pretty hot; hotter than your oven!).
I think you are referring to red giants.
Yes red giants are the largest. But the bigger stars of red giants can be called red hyper giants.
The oldest stars are classified as population III stars [See related question]
The oldest stars are classified as population III stars [See related question]