With #1, I think there was only one update the last time I played it, so I don't know if they gave us the ability to change their salaries in more recent updates or be able to turn the salary cap off from that menu.
Little confused with #2. I was looking at taking players from all of the teams and putting together the guys I like (Not all the best players at each position, but my favorites), so it's not just one team that I would want players from.
I would do this stuff myself, but my buddy has my Madden 13 copy right now and I was just seeing if I should get it back from him