You can take TOEFL whenever you want but i think you should apply. Even if you cant pass, it can be good experience for you. Cuz having a TOEFL grade in university can have lots of pros than cons. You should consider by your future plans.
Which school do you go to? I think you are not from a normal highschool beacuse there is no more student want to apply to TOEFL from normal highschools.
So this is the English Section. You can only write English, please edit your message.
İ think you should. Because these exams will allways be in your pocket and its a good practice. So yes, apply.