The Spaceman in Series 6 episode 1 killed a future version of the 11th Doctor.
yes he does
The Tenth Doctor dies and regenerates into the Eleventh Doctor
Yes he was killed in the impossible astronaut
Doctor Clayton died in 1947.
Doctor Greenwood died in 1951.
Eventually yes, he will regenerate into the twelfth Doctor.
The Tenth Doctor (a.k.a David Tennant) did not die. In fact, he regenerated into the Eleventh Doctor (a.k.a Matt Smith).
John Jones - doctor - died in 1791.
Alexander Fleming - doctor - died in 1875.
Alexander Hamilton - doctor - died in 1756.
John McClelland - doctor - died in 1875.
Francis Badgley - doctor - died in 1863.