1) To show the pointmarks, you'll need to turn their visibility on and to specify their size and color . Here's an example:
chartSeries.Appearance.PointMark.Dimensions.AutoSize = false;
chartSeries.Appearance.PointMark.Dimensions.Width = 5;
chartSeries.Appearance.PointMark.Dimensions.Height = 5;
chartSeries.Appearance.PointMark.FillStyle.MainColor = System.Drawing.Color.Black;
chartSeries.Appearance.PointMark.Visible = true;
2) Such line can be represented by a Marked Zone where its StartX, EndX, StartY, and EndY points are specified so that it gets drawn as vertical line. Here you may find and example and more details.
3) You need to go to the CharTitle element from the Property Grid and its corresponding Appearance settings to achieve this. You may also find our Chart Wizard helpful with such customizations.
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