# with it

Here "it" refers to the animal they will sacrifice and eat.

# the bread of affliction

"this bread will remind you of how much you suffered while in Egypt". This was the name of the unleavened bread. 

# out of the land of Egypt in haste

"out of the land of Egypt in such hurry you did not have time to make bread with yeast in it". 

# Do this all the days of your life

"Do this as long as you live"

# call to mind

"remember"