2 - I think your password will be the word password ... but I'm not 100 % sure, so your next step is to go to www.fantasysportstools.com, and if that pwd doesnt work, click on the support link to get the e-mail for penngray who should be able to assist you. A page or Private message for him should work as well.
3 - Yes. All picks made on the site are viewable to all owners drafting. Furthermore you will only be able to select players that have yet to be drafted. So if Warrior drafts Manny Ramirez, and even if you forget that he did, you won't be able to draft him because he will be removed from the available players draft list.