Going to Japan on holiday?

Question:

i want to go to japan on holiday with a friend,he is half japanese and half peruvian(latin-american),speaks japanese,he doesnt know much about Japan because he was mostly raised in Peru.
so here are my questions,you dont have to answer all of them XD
1- when is the best time to go?,i lived in the uk so i dont mind to go on the winter if there is a decent reason for it.
2-where to go?and why?
3-what do the japanese think of half european and half latin-american people?i know everyone thinks different from one another,but is there some sort of stereotype?
4-how much money to bring for 2 weeks?,in GPB if possible please.
5-any english speaking towns?
6-any places i should avoid?
7-this question might sound silly XD, im 16 y.o.,im 180cm tall,im white,spiked black hair,and muscular,not like body building but muscular in my upper body(sixpack,etc)and arms and shoulders.so,if i go to the beach would i be looked at weirdly?,i know im not the first person with a sixpack in Japan,but would people think im some kind of gang member/trouble maker?i've been told i can be quite intimidating some times :s

thankyou for answering!,sorry for asking so much XD

Answer:

1, late-March to early-April is the best time because you can see cherry blossoms.
2, It depends only on your needs.
3, Japanese people see all other people as "gaijin". They don't care if you are a half European and Latin American.
5, No town like that. But large cities like Tokyo or Osaka have English signs in its railway.
6, Japan is safe no matter where you go.
7, No. Japanese people know how Europeans look like. They don't see you as a troublemaker.