The mass of the host star.
its original mass when it formed
The black hole property that determines the Schwarzschild radius of the black hole is that it has mass but no angular momentum nor electric charge.
The Sun probably won't turn into a black hole. What determines whether a certain star becomes a black hole is basically the amount of mass left over, once the star runs out of energy. Less massive stars turn into white dwarves; more massive stars into neutron stars; and the most massive of all, into black holes.
Its mass
Space and time becomes stretched (and twisted) near a black hole. This is known as "frame dragging".
After the death of stars it becomes color less and was not able to see it
The mass of the star.
A black hole absorbs everything it sucks in, including matter and light. Once something crosses the event horizon of a black hole, it is unable to escape and is thought to be crushed into a point of infinite density at the singularity.
Such energy has a mass equivalent (m = e/c2). Any such mass falling into the balck hole will increase the mass of the black hole.
They get destroyed. Their matter becomes part of the black hole.
When light is traveling away from a black hole, its wavelength becomes longer. This is called blue-shifting. If it's going in, the wavelength becomes shorter, which is called red-shifting.
Yes, a star Super Novas when it dies and sometimes the explosion is so vast, it creates a fissure that becomes a black hole.