Your local city or county likely has information online. Do a search for "tax assessor [your location]." That should bring up information on the property. It won't be too useful, though. It'll show you the current and recent tax assessments . . . but those have little or nothing to do with a property's real value. It'll show you what the recent sales prices and dates were. But that won't help because a sales price from 4 or 5 years ago has nothing to do with the home's current value, what to offer, or what the lender will approve. It'll provide information on number of bedrooms, bathrooms, etc. But that information fairly frequently is incorrect.
You'd be better off researching what other nearby homes sold for--so-called comps. That's because your objective is to try to determine what the house really is worth. (Note: A Realtor can easily help with that.)
The other things you might want to know--what the house looks like inside, what its condition is, what the layout is, what the neighborhood's like--are things you can easily determine by viewing the house in person.
Hope that helps.