Questions about a new LLC and future businesses...?

If you create an LLC to use for banking purposes, as a majority owner with a minority co-owner, but both later intend to put other businesses under it (to protect ets, etc)... how do you fill out the paperwork for a TIN/EIN? If you're not equal partners, is it still a partnership? If right now it's only for banking purposes, do you fill that out, or do you guess at what you're going to do in the future? None of the businesses should have employees, they're "sole proprietorships" I guess. Business... not what I went to school for....