[1] Born in Zürich, Switzerland, he is the son of the Austrian-Swiss actor Robert Freitag and the German actress Maria Becker.

Tobias's first role was in the feature film Romance of a Horsethief, co-starring with Yul Brynner, Serge Gainsbourg and Eli Wallach.

[3] He then co-starred with Charlotte Rampling in the Jacobean tragedy 'Tis Pity She's a Whore, a film directed by Giuseppe Patroni Griffi.

In 1981, he starred in the British television series Dick Turpin's Greatest Adventure, where he played the character Noll Bridger, a Colonial North American.

[5] In 1991, Tobias starred alongside Charles Gray in the sci-fi movie "Firestar – First Contact" for Ice International Films.