check out
www.nalpdirectory.com
biglaw firms pay around 125k starting (in the bigger cities).
hours vary firm to firm. some are sweatshops that make you work from 8-9 on weekdays and a few Saturdays too. well, you should check out each firm's yearly min. billing requirements and do the calculations. NY Biglaw tends to be brutal.
To get into them, you better be at a top law school or top % of an not so top law school.