The witch in the Geico Commercial is Jordana Oberman.
are the paintings in the geico commercial real
The same person as the actor in Geico's The Walton's commercial.
The piggy's voice in the Geico commercial is provided by actor Maxwell the Geico Pig.
No, Daniel Tosh is not in a Geico commercial. Geico has featured various celebrities and comedians in their commercials, but there is no record of Daniel Tosh appearing in one.
I would start at Geico's website.
This is from the "Geico" commercial where the gecko is in the refrigerator looking for his egg salad.