Text: any further questions or comments (e.g. about the requested number of units etc.)?

Correct capitalization: Any further questions or comments (e.g. about the requested number of units etc.)?

Text: details about a family for sren jensen and madsine nielsen

Correct capitalization: Details about a family for Sren Jensen and Madsine Nielsen

Text: as you already understood, feng shui deals with the space surrounding the person, as well as everything that affects it from outside.

Correct capitalization: As you already understood, Feng Shui deals with the space surrounding the person, as well as everything that affects it from outside.

Text: it is the most commonly used method on these "free giveaway", or "i'm quitting, free items" type sites.

Correct capitalization:
It is the most commonly used method on these "free giveaway", or "I'm quitting, free items" type sites.