Most people wear Bigdei Shabbos, Shabbos clothing. That is usually a white button down shirt and black pants for the men, and nice (appropriate) clothes for the women. During the seder, some married men wear a Kittel, a white garment that resembles burial shrouds.
He'll wear a business suit with a tie and even a kippah.
There is no tradition of gift giving during Passover.
There are no Jewish Christians.
the Israelites did not leave during passover. When they did leave it was Moses who lead them.
Only if it's certified kosher for Passover.
Jewish law doesn't permit fasting during Passover.
It means that you can't eat them during Passover.
Passover isn't a person, it's an event. The first passover took place during the Israelite exodus from Egypt.
Lamb can be kosher for Passover. However, Ashkenazi Jews traditionally do not eat lamb during Passover.
Passover is not a time of fasting, so Jewish people can eat during the middle of the day during Passover.
Yes, you can eat steak during Passover, provided that the meat is kosher and prepared according to Passover dietary laws. Many people enjoy meat dishes during the holiday, as long as they avoid leavened products and any ingredients that are not compliant with Passover restrictions. It's important to ensure that any seasonings or marinades used are also kosher for Passover.
Can you? yesShould you? no