1. Can I apply to Law schools with my English major gpa and not Econ?
Generally, your undergraduate gpa is calculated by LSAC and they calculate ALL undergrad coursework. In your major, out of your major, the 3 classes you took at a JuCo one year, everything. You can't exclude any undergraduate classes from the calculation (except by, for instance, not providing a transcript, and lying that you ever attended, etc.)
2. Does coming from an Ivy help my chances at getting into a top law school regardless of the fact that I don't have a stellar gpa?
Maybe, but frankly, when admissions people are being candid, they'll tell you that pretty much anything but gpa and lsat are just not real factors. They just don't have the time to read everything they get and they don't have a mechanism by which to say that volunteer work in botswana is worth an extra .1 in gpa or whatnot.
If I had to put a number on it, 95% of the decision is LSAT and GPA. If you are a URM, that factors. Other than that, pretty much any other factor would be 1% of the admissions decision or less.
I don't mean to discourage you, but with a 3.0 gpa, your chances of going to a truly top law school are nil. However, you can still get into a school that's top 50 with the right LSAT.
Best of luck.