to learn, to acquire knowledge / to wear (clothes, accessories, etc.), to put on

気を付ける: to be careful, to watch out; to take care

Misspelling of きをつけて. Since o is written as を when used as a particle.

always

the latest; the newest

(colloquial) a girlfriend (a female partner in a romantic relationship)

fashion (current (constantly changing) trend, favored for frivolous rather than practical, logical, or intellectual reasons)

(literary) they (about women or girls)

(formal) Female third-person singular pronoun; she, her, girlfriend

Watch yourself, be careful, literally, "keep your health" / take care (used when parting)