How important is EC?

<p>Thanks for your reply.
Currently, I’m a freshman.
Most accepted applicants to Ivy colleges are well-rounded, with lots of extra-curricular activities (volunteer hours, clubs, etc.) besides high grades, but is it not true for accepted applicants of Ivy grad?
Could you please tell me what GPA (both overall CGPA and senior GPA) I should have to be safe?
How important is freshman GPA to Ivy grad schools? Due to transition from high school to university, I didn’t start off this year right, but I’ll surely do much better in 2nd semester and 3rd semester (my university is trisemester system) now that I figured out how to do well in university.
In college, are there things like high school AP that will give your grad school application a bonus score?
Does junior correspond to 3rd year?
How many and what kind of researches are considered excellent?
How can I get involved in research relevant to my field?
What is statement of purpose?
Lastly, where can I view statistics of previous years’ students accepted into Ivy grad schools?
Sorry for asking too many questions.</p>