Jennifer, Cook County can provide a list of licensed centers and home daycares, with prices - ###-###-####. Also, the West Suburban Home Daycare Association can give you a list of local home daycares. ###-###-####) The phone is answered by a volunteer who usually knows the various daycare providers, so you may get someone who can give you the inside scoop on who has a lower-cost daycare.
I also know of a great daycare provider who I think still has some space and who I think is cheaper than my provider, in South Oak Park. She's also pretty flexible (she is our backup daycare, and she and her college-aged daughter have both babysat for my kids for several years now.) If interested, e-mail me - ____@____.com
In my experience, in-home daycares seem to be the lowest-cost option. You might be able to get a two-child discount.
Our daycare cost for my 2yo is pretty reasonable - $200/week for one child full-time. (we had his big brother at the same home daycare, and the prices haven't gone up in 3 years)
On the pickup time, 6:00 is typical or even a little bit late. I have to pick up by 5:30. There are a few centers with longer hours (there's a 24-hour center in Oak Park) but they have long waiting lists.
Since this is a somewhat high-cost area, you may be surprised to find out that you can qualify for various programs. Also, most school districts have free, state-funded pre-k programs that are not income-based.
Good luck, and welcome to the area.