He trained as a ceramics painter, and studied at the Fachschule für Gestaltung in Stuttgart.
He is best known for his large paintings combining medieval and modern styles. In 1953, he settled in Schwäbisch Gmünd, a town in the eastern part of Baden-Württemberg. In 1969 he moved to the neighboring town of Lorch, where he has resided since.
Foreign his work, Kloss has received the Premio Internazionale Federichino of Iesi, Italy in 2004.
The Staufermedaille of the state of Baden-Württemberg in 2005. And the Irenen-Preis of the Freundeskreis Königin Irene Maria von Byzanz e.V. of Göppingen in 2003.