Formal:
* Je joue de tous les instruments. (This translates literally as "I play all instruments" but implies that you can play any instrument)
* Je suis capable de jouer de tous les instruments. (This is more emphatic and means "I am capable of playing all instruments")
Informal:
* Je joue de tous les instruments. (This is the same as the formal version but less formal in tone)
* Je sais jouer de tous les instruments. (This means "I know how to play all instruments")
More specific:
* Je joue de plusieurs instruments. (This means "I play several instruments")
* Je joue de différents instruments. (This means "I play different instruments")
It's also important to consider the context of the conversation. If you're being asked if you play any instruments, you could simply say:
* Oui, je joue de plusieurs instruments. (Yes, I play several instruments)
* Oui, je joue de la guitare, du piano et du violon. (Yes, I play guitar, piano, and violin)
The best way to say it will depend on the specific situation.