There are several places to look up information about property taxes in Oakland County. I would agree with Gordon, the Michigan Department of Treasury website has information about estimating property taxes and it's difficult to find the link. http://www.michigan.gov/taxes/0,1607,7-238-43535_43540---,00.html
You can also look under the Oakland County website under Equalization to find the data used for each city above. http://www.oakgov.com/equal/ bottom right link box.
2008 figures will be available under the tax estimator sometime during July. The Equalization department above determines how some taxes are allocated. There usually is some deviation by school district. You should watch each home, because if the home is currently non-homestead, it will remain taxed at that rate even if this is for your primary residence.
Effective July 1, 2008 the State of Michigan enacted the Agency Responsibility Act, that requires real estate companies and their agents to disclose services (or lack of) for Buyer's Agents and Sellers Agents clients. Sample forms and a copy of the new disclosures and limited services waiver are available at http://www.mi-living.com/index.cfm?pageid=1619
I suggest contacting several lenders and getting a Good Faith Estimate as suggested by Kathy. Some lenders in the area charge a fee for pre-approval and some are free. If you would like free pre-approval, I can suggest two companies, (there may be more) http://www.mi-living.com/index.cfm?contentpage=approval.cfm simply complete this form and I will pass it on to two lenders not charging for pre-approval. Alternately, you can go to
Some of the above will charge up to 399.00 for pre-approval.
If you have any questions feel free to ask. Real estate professionals cannot suggest a city, neighborhood, or school district to live, this would be a violation of State and Federal Laws. The Oakland County website will have information about each community. I suggest http://schoolmatters.com if you are trying to decide upon a school district.
On the mortgage lender question I would recommend you contact Jack Schwartz at 734-524-0400 or Jack@MortgagesByJack.com. Jack has helped many of my clients and he will find you the best overall deal out there.
The property tax estimator link from the Michigan treasury is where you can find the property taxes for a property that you need. The full treasury link is in the web reference below. Remember to get a good faith estimate from lenders comparing closing costs and interest rates so you can shop for the best opportunity.