Toyota will be officially revealing its new Formula One car TF108 to the world and media on 10th of January 2008. The even will take place at the team’s technical centre in Cologne, Germany. The team's racing campaign for the 2008 season will start with that event as well.

Source: http://www.fosagold.org/F1SA/index.php?option=com_content&task=view&id=4642&Itemid=2