A noncreature permanent that turns into a creature can attack, and its {T} abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn’t matter how long the permanent has been a creature.

If the noncreature artifact had any other supertypes, types, or subtypes, it will keep those. In most cases, the artifact creature won’t have any creature types.

If an Equipment attached to a creature becomes a creature, it becomes unattached. An Equipment that is also a creature can’t equip another creature.

Multiple instances of deathtouch or lifelink on the same creature are redundant.