This is the most common problem found by home inspectors. To improve drainage, you may have to install a new system of roof gutters and downspouts or have the lot re-graded to better channel water away from the house. It is also one of the main reason a homes foundation requires work.
An insufficient or out-of-date electrical system is a common problem, especially in older homes. This is a potentially hazardous defect and not to be taken lightly. You may have to replace the entire electrical system, or at least part of it, to bring this home up to code or to make it safe. A new control panel is often done to allow more power to the home.