Foundation is pulling away from house! Help!

Two family house built around 1920, full basement brick foundation. House sits about 40 feet from commuter rail train tracks. Notice on the outside foundation the bricks are at angle, leaning away from the house and on the other side the same thing leaning away in the opposite direction at a smaller angle. Down the cellar the joists are notched and resting on the sill and the main beam but pulling away on both. First floor has a sag and you can see about an inch gap between the floor and the wall on the worse angled side. The second floor appears level and no gap. We are new to house so it may have been like this for years. My question is could you run some supports for the joists down the cellar? or does this sound like it needs a very expensive fix?
any suggestions helpful

 

You need to get an engineer in too look at the foundation. They will tell you what needs to be done. Adding supports to the the joists is not going to be the answer. The foundation will need the work done.

 

I agree. This does not sound like a do it yourself project and I think it will be expensive, but I would not put it off. The sooner you repair it the easier & less expensive it will be to fix. If you wait too long the house could be a loss.