受ける：うける：$$$: to recieve anything - a letter, an email, some bad news, a bad influence from the neighbor's kid. . .
受け取る：うけとる： to recieve a physical thing that is handed to you
もらう: used with another verb, as in 手伝ってもらう or 買ってもらう。 to recieve an action (from someone) - used whtn you ask someone for a favor and they do it.
くれる: This is tricky - used by itself, it means "to give." But if - like もらうー you use it with another verb, as in 助けてくれた or 食べてくれた, it means 'to recieve an action from someone else - THAT THEY DID WITHOUT YOU ASKING'. Literally, "She gave me XXX."