This is an irregular verb. It follows the conjugation pattern of the verb ficar.
Present:
A Ana toca violão numa banda.
A Ana toca guitarra numa banda.
Ana plays guitar in a band.
Preterite:
O Miguel tocou no vidro com cuidado.
Miguel touched the glass carefully.
Conditional:
A Clara tocaria essa peça lindamente.
Clara would play that piece beautifully.