Yehudah Tzvi –
The gemara in Berachos says that all dreams go after the interpretation and that an uninterpretted dream is like an unopened letter.
That being the case, here’s my interpretation:
In your dream, the significant amount of money you came into is a metaphor for the mitzvas you will m’kaiyaim in the coming year. You my friend will be wealthy in the s’char that the Ribono Shel Olam is faithful to repay to those who do His Will. Through this z’chus, He will provide you with monetary reward in order to further your charitable endeavours.
Regarding the family friend who died, in your dream you witnessed a sick person dying. Accordingly, in the coming year, the sickness itself will in fact die and your friend will have a complete recovery from his/her cancer.
May only good things come to you, your family, and your loved ones throughout this month of Elul and the coming year.