Fujoor (immorality, wickedness) means going around committing sins and going to extremes in that. The remedy for that is repentance, adherence to righteousness, keeping company with good people and forsaking the company of evil people.

The one who withholds his wealth from his wife and children when he should spend on them is a miser.

The words mentioned in this hadith about lying are not from the Prophet (blessings and peace of Allah be upon him). Therefore, it is not permissible to attribute this to the Messenger of Allah (blessings and peace of Allah be upon him). The basic principle is that zina is worse than telling lies