Homes built after 1978 typically don't have lead based paint (that's the year they stopped making it)... but older homes, with lead based paint, hopefully have been over-painted many, many times since 1978, and the paint should be well encapsulated.
If you have to remove lead based paint, make sure you hire professionals who will handle it properly.
Yes, as an owner, you can legally chip and sand it.
The problems start when a licensed professional in involved; they have to follow the mandated procedures.
The problem with LEAD PAINT and ABSESTOS is when it gets into the air: You need to protect yourself.
You can probably GOOGLE the safeguards and procedures.