It really doesn't take much to look up the actual meaning of corona and why covid-19 is called corona. as CaptainZoll said, it refers to something that resembles a crown, and covid-19 does have crown like structures as you can see in the image above. Toyota had no way of "pReDiCtiNg tHe FUtUrE", they just called it that because it was a semi-luxury car and it did actually kinda look like a crown, or at least something you'd see someone of royalty being driven around in. thanks for coming to my ted talk
and the fact that toyota had a "crown" naming scheme at that time (crown, tiara, corona, carina, corolla, cresta, camry, cressida, etc.)