I normally understand that this Trulia community is a place for people that want to do it themselves as much as possible. I don't normally push on people that ask these questions to go get a realtor. However, since this looks like this may be your first home I am going to agree with Dan. Start by getting a good realtor and a good lender.
I am going to follow up your question with what may be your next obvious question, How do you find a realtor? Ask your friends, co-workers, neighbors, anyone that might have worked with a realtor in the past. Look for someone that takes a special interest in working with first time home buyers and working the extra education steps that may be required for a first time home buyer. You will spend a lot of time with this person. Make sure you respect them, like them, and want to learn from them.