As a child Paar lived in the town of Bechyně in Czechoslovakia. In 1947 he moved to Switzerland for health reasons. In 1948 he was joined in Switzerland by his parents who had fled the Communist coup d'état. In 1954 Paar and his family moved to Austria. Their castle in Bechyně was seized by the Communist government by a decision of the people's court in Týn nad Vltavou on 25 March 1949.