Your document will require a lot of work to set right. I suggest you hire someone who is skilled in document design to do this correctly. In the meantime, here is a macro you can use to move all the lines that are presently behind the tables to the front, so that you can then select and delete them.
Code:
Sub MoveToFront()
Dim Shp As Shape
For Each Shp In ActiveDocument.Shapes
If Shp.WrapFormat.Type = wdWrapBehind Then
Shp.WrapFormat.Type = wdWrapFront
End If
Next
End Sub
To see how to use the macro, go to:
http://www.gmayor.com/installing_macro.htm