No, but they look very similar! porque (one word, no accent) means "because" and is used to give a reason, like in this sentence. If you want to ask "why?", you use por qué (two words, with an accent on the e).
The verb for "to go out" is salir. Why is it salgo here instead of "salo"?
salir is slightly irregular. When you are talking about yourself ("I go out"), it adds a gto becomesalgo. The rest of its forms are regular (like sales for "you go out").
Where is the word for "it" in llueve (it rains)?
Spanish doesn't use a pronoun like "it" for weather. While in English we have to say "it rains", in Spanish you just use the verb all by itself. llueve means "it rains" or "it is raining".
If the dictionary says "to rain" is llover, why is it spelled llueve here?
llover is a "stem-changing" verb. This means a vowel in the middle of the word changes when you use it. For this verb, the o changes to ue. Since weather only happens in the "it" form, you will almost always see it as llueve.
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