Hi again lol. Yes there is a way to delete edges. Just select the edges you want to remove and hit X-> Edge Loops
I think with your model, the ones in 1 you could remove one of the edge loop lines, and the other you would need because of your windows. Then you could probably move the vertices in 2 to the corners and either W-> Merge your vertices to the vertice in the corner, or you could also grab and slide and then remove doubles (double G and then slide to the corners, then W-> remove doubles)
Here is a very good video of someone making a building in blender:
at around 7:15 he does the double G and then slide remove doubles thing lol. He uses lots of different techniques to remove extra vertices so you should try to watch it.