Stove: If the stove is on, then it would have mechanical and thermal energy. If the stove was off then it would have potential energy.
Someone riding a bike: Mechanical energy, thermal energy, kinetic energy, and depending on the angle of which the person is riding the bike on, potential energy.
An unplugged toaster: I want to say that the unplugged toaster has potential energy, because it does not yet have its energy, but once someone plugs it in it gains energy.
A plugged in and lit light bulb: The light bulb would have a bit of thermal energy.
The sun: I am not quite sure about the sun, but I think that the sun has all types of energy? I think this because since the sun could be as big as or bigger than a planet it would have a magnetic field, giving it magnetic energy. If you look at pictures or videos of the sun you might see that there are parts of light that are moving around about the sun, giving it a bit of kinetic energy. Obviously, the sun has thermal energy, because of the amount of heat that the sun has. I am not sure about this one, but there might be chemical energy in/on the sun depending on what the sun is made up of.
Matches that are just being struck: There is kinetic energy, (when the matches are being struck) and thermal energy, which is the fire on the match.
