Final answer:
The Doctor's promises to Charles involve offering guidance and potentially a commitment to follow ethical practices, although explicit promises are not detailed in the excerpts provided.
Step-by-step explanation:
The two promises that the Doctor makes to Charles relate to guidance and support. Though the specific promises are not explicitly mentioned in the given excerpts, they suggest that the Doctor is willing to aid Charles in his aspirations, albeit with limitations.
The Doctor acknowledges Charles's rights to make himself into what he wishes to be but also expresses the practical constraints of financial resources. Moreover, embedded in the interactions is the Doctor's sigh, signalling a complicated sense of responsibility, and another excerpt alludes to the Doctor's possible commitment to not killing, highlighting ethical promises.