is the thing about sending this to 12 people and getting 120 new emojis true

That is not an official message from Apple. If you would believe a message like that, you really need to review the article about identifying phishing messages. While this is a meaningless message, you could really get into a lot of financial trouble through scammers using these same techniques to convince you of other more serious things.

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

By responding to this scam message, you have let the sender know that you are capable of being fooled and now they will have a lot more to send you. Watch for future messages that ask for personal information such as Apple ID Password or Financial Info and do not send them anything.

Those are scam messages. It is not an official message from Apple.

Apple does not send out scam messages like this. Expect your junk mail to really pick up in quantity soon.