Getting Around Salzburg

That sort of depends on what you mean by getting around. And also where you're staying. I'm not sure what you mean by "north/west of the river". The Salzach runs through Salzburg roughly from southeast to northwest, so either you are on the northeastern side of the river, or the southwestern side. Or as they are also known, the right and left side.

But both parts of the old town are pedestrian zones so to get around them you walk. There are also a number of bus routes running along the edges of them.

Buses are frequent and will help you out. You can pick up a map and or buy tickets at the train station. If you are getting a "salzburg" card local buses are included. Here is a map of the bus routes. https://ontheworldmap.com/austria/city/salzburg/salzburg-public-transport-map.html

I apologize for my error, we are staying Northeast of the River near Mozart University. Thank you for the help!

In that case, you have a couple of bus stops in the area that are served by a number of routes. Even if you're not getting a Salzburg-card, a 24 hour ticket for the buses is very cheap.

it's a walking city and designed for such, so you will be at a disadvantage. Don't think taxis will be much help. As noted, looks like you'll need the buses.

The bus routes in Salzburg do not go into the pedestrianized historic area of Salzburg. Your best bet is to take taxis to really minimize walking, but these will be $$ and possibly hard to locate. Getting a taxi at your hotel will be easy, but when it is time to return, you will need to find a taxi stand. I suggest asking your hotel to pinpoint for you on a map where the taxi stands are located.

Assuming that you are staying near Mirabell Gardens, it is only a 7 minute walk to Mozart's birthplace. This building is centrally located. Do you think your partner can do 7-10 minutes?

I keep the "Free Now" app on my phone for taxis especially in German speaking countries. On a recent trip to Salzburg, I got on a bus going in the wrong direction. When I figured that out, I hopped off at a bus stop that sadly had no further service for the day. I used the Free Now app to request a taxi. It's a lot like Uber/Lyft. Worked great!

I always stay near the train station which also has a bus depot. Often just walk a mile to the “outdoor mall” street below the castle. We have found excellent eating across the river - a less fancy pedestrian area.