Jason Hallgate, 32, blew a hammer into Michael Bradley's head, lay in the bed to dodge him, and stabbed him twice in the neck with a knife, Leeds heard.
The murderer and his partner, Nicola Anne Beck, 43, later searched Huntington's home and stole the car before leaving the pensioner's bloody body on the bedroom floor.
Formerly from Doncaster, Holdgate must serve 18 years from the date of his arrest last November before applying for parole, Judge Harold Crowson has decided. He pleaded guilty to the murder of a 72-year-old man.
Previously, Beck of Doncaster was jailed for 16 weeks after pleading guilty to stealing Mr Bradley's car.
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