A better way to say it would be "When I was a teenager I lived in the USA."

I don't think this question makes any sense, it's not really a question without an "or, is, what, who, when, where, why, or how..."

Possible English corrections: A person will become more competent in life if he knows a lot of people who speak different languages. or I think people accomplish more when they know people who speak different languages.

what are the tones for these words?

Some good advice: First, German is composed of a lot of idioms, so be prepared to learn a lot of figures of speech to say a lot of common things. Second, German has a lot of conjugation (not as much as spanish) but like Spanish also has male and female nouns. German even has neuter nouns. The gender of the noun can effect other words in the sentence, too. For instance, "die Sonne" means "the Sun" and "der Mond" means "the Moon." Notice how the word "the" changes to "die" for the feminine noun "Sonne" and the same word "the" changes to "der" with the masculine noun Mund. With a neuter noun, like "das Auto" which means "the car", you use "das" for "the." Third, you want a really good foundation for German. To speak it correctly you MUST know all the parts of speech because of how the word "ein" conjugates based on when it's used. (it has 6 different variations) German has many prepositions that are used in different contexts to mean different things and also has multiple words that mean the same thing. Here's some examples: "Denn" and "weil" both mean "because" The word "aber" can mean "but", "however", or "really" based on the context.

Fourth, (most importantly) you must learn the accent and rhythm of Speaking German. Including very much is how letters are pronounced. Here's some hints. W sounds like V V sounds like F At the end of a word, D sounds like T At the end of a word, G sounds like K CH makes two sounds (how they sound depends on who you talk to) but the way I hear most is either a lighter SH sound with the teeth farther apart as in the word "ich" and the second sound is a deep throat sound like in the word "doch." A good word to practice this deep throat sound is with "nechste" which means "next" Try to say "next" but bring the X sound deeper into your throat using your saliva. Other languages use this sound such as Hebrew, Yiddish, Russian, and Arabic. The special ¨ umlaut accent mark is pretty easy, you pull your lips tighter together and raise the pitch just a tiny bit when a letter has an umlaut on it. Like the word "über" which sounds like "oo-ber." I hope this is helpful!

It means: "it is too expensive, I cannot afford it" "way over the top" in this context implies "it costs more money than I have to spend." In general, "over the top" means "it's too much."

You need to provide more context, but I can try to define what it means: "Then he appeared" probably means he walked into the room, or he came into sight nearby. "what a fuss about nothing" means that somebody is very upset and it's not a big deal. Somebody is worried but there's nothing to worry about. "this treat's on me" means "I am paying for this" usually the context is in a store or a place where people eat or buy drinks.