Can you move the doors or staircase?

any idea where to move the door(s) or change the staircase please? the upper half of the staircase probably has to stay

Be very careful: that staircase is probably grandfathered. If you touch it (aside from replacing carpet) you have to bring it up to code, which can be difficult and expensive.

Was this a two-family house at one point? I'm wondering if it led from the porch to an upstairs apartment.

My grandparents' house had a staircase that turned, then went down to a landing. Two steps down to the right you were in the kitchen, to the left the living room.

This screams illegal attic conversion. You need local help from a professional that can see how the spaces connect and come up with a plan to reorient the layout.

Move both the entrance to the kitchen and the living room to the porch area?

Without a detailed floorplan I don't think we can offer any useful suggestions.

The second floor living area and rooms are on the township’s record. Is it just a very bad staircase design?

here is the 1st floor floorplan from 3K miles away

How old is the house? Is/was it a working class neighborhood? My guess remains it was a separate apartment.

You need a local architect to help you come up with something and get it approved.

Are the stairs needed? Can they be removed? Is this the only way to get to the exterior porch?

The floor plan doesn't match what I'm seeing. There is no door at the bottom of the stairs, only an 'exterior porch' that seems to be an interior space. More pics?

You've updated your original post with a new diagram asking if you can create a turn in the stairs.... do you have or can you create the headroom required?

I will not even begin to help since we have no real idea of what this looks like in real life from the pic you posted. waht i see it that you access the kitchen from off a step I could be wrong but if that is the case this mess cannot be to code for sure and if you are buying this house you will need a huge money tree to get it right . Are the porches heated ? Did you have ahome inspection ? Please add info here DO NOT start another post.

In addition to party_music's suggestion, add a door from the kitchen into the dining room.

The porch is not heated. Yes, I own this house, but no, here is no inspection.

Underneath this stairs is the stairs to basement. Yes, kitchen and dining room are connect. The rectangle was only to illustrate the area.