No
The planets of our solar system are most definitely NOT all the same size.
The Earth and Venus are pretty close to being the same size (about 5% difference), and Uranus and Neptune are also pretty close to the same size (about 4% difference). All of the other planets are different.
No.
No. They are all different
All planets (in our solar system) have the same sun. All the planets rotate around the same sun that Earth rotates around.
Yes, Earth is the largest of all inner planets in our solar system. The inner planets, also known as terrestrial planets, include Mercury, Venus, Earth, and Mars, and Earth is the largest in terms of both size and mass.
Compared to the size of Earth, the Jovian planets (Jupiter, Saturn, Uranus, Neptune) are much larger in size. They are called "Jovian" because they are similar in size and composition to Jupiter. Jovian planets are primarily composed of hydrogen and helium gases and have thick atmospheres, making them significantly bigger than Earth.
Earth and Venus have very similar masses and sizes; all other planets are either significantly smaller or significantly larger than the Earth. Earth and Venus also are relatively close in terms of their distance from the sun; the orbits of all other planets are farther from the Earth's orbit, except for the closest planet, which is Mercury.
Venus is considered Earth's twin because it is similar in size, composition, and gravity to Earth. Both planets have rocky surfaces and similar densities. However, Venus has a thick atmosphere that is mostly carbon dioxide, leading to extremely high temperatures and pressure on its surface.
No, the planets have different number of moons, from zero to about 60-70.
No, they are real different from Earth.
As of now, there are no known planets that are exactly the same as Earth in terms of all its characteristics. However, there are planets known as "Earth-like" planets that share some similar characteristics such as being in the habitable zone of their star and having the potential for liquid water on their surface.