I can see Venus and Mars, what about the others?
The faintest we can see is magnitude +6.5
Here are the apparent magnitudes of planets at their brightest, I've boldened the ones that fall within visible range:
−4.92 planet Venus
−2.94 planet Jupiter
−2.94 planet Mars
−2.48 planet Mercury
−0.55 planet Saturn
+5.38 planet Uranus
+6.64 dwarf planet Ceres
+7.67 planet Neptune
+13.65 dwarf planet Pluto
Other dwarf planets are generally fainter than this.
In addition to Venus and Mars, one can easily see Mercury, Jupiter, and Saturn with the naked eye. Mercury, Venus, Mars, Jupiter, and Saturn were known to the ancients. That's why they're called "planets" (which means wanderers) rather than stars. The outer planets were not discovered until the invention of the telescope.