Creatures with Surge as Commander
Is it possible to use a creature with a surge ability as my commander?


Yes

Surge does not care about where your card is when you cast it, so it also works in command zone.

You still need to apply commander tax to the cost afterwards


  a creature such as Tyrant of Valakut?


No

I believe your commander should be a legendary creature, which Tyrant of Valakut is not.