Also not crazy about that small tiered wall with bricks on top in the second photo that is holding up the grass. Is there anything I can do to widen that walkway? I can't just remove the wall because the grass is higher.

I would stay with concrete. I would add arow of windows to the garage door. I would paint the trim on the window in the brick the same gray as your other trim. I do think the white is too bright with the dark gray trim so I would tone it down. Maybe a very pale fray gray. As far as the wall clean it and paint it to match the new concrete.

You could do concrete pads edged in block.

Where I live in California, a new driveway would be a serious amount of money, and for not a great payoff. Pavers would, imho, compete with the brick. Its a nice house! maybe a power wash for the driveway and little wall. Thats it from my point of view.