The only difference is in their placement in the sentence. Too is used at the end of a sentence. Also usually goes before the verb or adjective.
For example: He likes chocolate
I also like chocolate. ( you can't say "I like chocolate also")
I like chocolate, too.
2 de noviembre de 2017
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'too' has much more meanings and too=also ONLY at the end of a sentence.
'too' has much more other meanings. Among them: likewise, really, actually, moreother, extremely, highly, either, over etc.
2 de noviembre de 2017
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