If the artifact copied by the token had any "when [this artifact] enters" abilities, the token also has those abilities, and they'll trigger when it's created. Similarly, any "as [this artifact] enters" or "[this artifact] enters with" abilities that the token has copied will also work.

If the copied artifact is copying something else, then the token enters as whatever that artifact copied.

If the copied artifact has {X} in its mana cost, X is 0.

If the copied artifact is a token, the new token that's created copies the original characteristics of that token as stated by the effect that created the token.

The token copies exactly what was printed on the original artifact (unless that artifact is copying something else or is a token; see below). It doesn't copy whether that artifact is tapped or untapped, whether it has any counters on it, or any Auras or Equipment attached to it, or any non-copy effects that have changed its types, color, power and toughness, and so on.