You have a lot of stuff going on there. The more different things there are, the greater the concern may be. Individually, each of the photos by themselves are common in older houses and by themselves do not appear (from these perspectives) to be significant.
Pic# 1; The chimney and the house are separate structures in older homes. If the chimney has a foundation, it is separate. A crack in the juncture between the wall and chimney is common because the brick is not interlocked. This is good, or the chimney movement will pull the wall brick off the house.
Pic# 3&4: Step cracks. These occur the easiest, are caused by movement, and often originate/terminate at a wall opening. They are good indicators of the structures direction of movement or cause of movement. Generally not a real big issue.
Pic# 5:Shearing cracks. This takes more force. The type brick should be considered. This brick appears to be a brittle type, more likely to crack under stress.
Pic# 6: The wall opening is the originating source. Wider next to the window, smaller to the left shows origin.
Pic# 7: A previously repaired mortar joint that reoccurred since the repair. When it happens again, it means the movement is still active, at least from after the repair. Again a common location of occurrence. Window lintel puts a lot of pressure at a small bearing surface.
Pic# Interior #1 Sheetrock crack at window opening. Increases the potential issue if associated with an exterior event.
Pic# 2: Sheetrock next to the brick is common because of the thermal properties of the two materials. It’s basically a glued joint, with bad glue.
What geologic zone is this house located (type of soil)?
Observe foundation condition (this is the most critical.
Because there is so much stuff, and it’s not your job to do more than observe and report, I would recommend a more in depth look at this, by others.
Fixing this is not a catastrophic issue. It just needs stabilization. It is costly, but not catastrophic.