Both players actually signed over the summer transfer window but have been unable to play for Barcelona due to the FIFA transfer ban which ruled that the club could not register newly signed players.
The ban expired yesterday and Turan was given the number 7 shirt while Vidal took the number 22.
Turan and Vidal were in high spirits after their second unveiling ceremony which was evident to see later in the day when the two players combined to score a classy goal during training.
Vidal turned his marker inside out before finding Turan just outside the six-yard box who slotted the ball into the back of the net.
Both players are expected to make their official Barcelona debut tomorrow in the Spanish Cup against rivals Espanyol in the Last 16 first-leg tie at the Nou Camp.