What kind of paint do I need for baseboards?
Just go the paint store or home improvement store and tell them you want white interior trim paint.  It is usually a little more glossy.  Painting is not my favorite thing to do so I always take the easy way out and go Porter and ask for their trim white.  I usually judge the quality of the paint by the price.  As for eliminating masking tape, you can buy a guide that has a steel blade and a handle to hold up against the edge to get a clean line.  You just have to wipe it with a rag frequently.  Happy painting!