Have your heating system cleaned and tuned by a qualified contractor. A pre-season tune-up and filter change is a good investment. It reduces the chances of breakdowns in the middle of winter, improves safety, and pays for itself through more energy efficient operation.
Lead-based paint is usually not a hazard if it is in good consition, and it is not an impact or friction surface, like a window. It is defined by the federal government as paint with lead levels greater that or equal to 1.0 milligram per square centimeter, or more than .5% by weight.