None. Parallel lines do not intersect in Euclidean geometry.
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Parallel lines don't intersect, no matter how many of them there are.
In space with 3 or more dimensions, there are infinitely many pairs of lines that are not parallel and do not intersect.
Two lines can intersect at none, one or infinitely many points.
A point can be intersected by infinitely many lines. Two points intersect in only one line. Three points either intersect in a line or not at all. This is only considering two dimensions.
None. A marble is a sphere, so there are no points where lines intersect.