A person afflicted with tzara'at must be sent outside which areas, and why?
A metzora is expelled from all three camps (beyond Jerusalem) because his impurity is the most severe — he renders a house impure simply by entering it, which does not apply to a zav or corpse-impurity.
Question 2
The verse 'And Moses took the bones of Joseph with him' (Exodus 13:19) teaches what regarding corpse-impurity?
The Rambam derives from this verse that a corpse itself — and those impure because of corpse-contact — are permitted on the Temple Mount ('with him' = into the camp of the Levites), unlike a metzora or zav.
Question 3
From which zone of the Temple complex are non-Jews and those who had relations with a niddah excluded, according to halacha?
Halachah 5 states that from the chayl inward, gentiles and those who had relations with a niddah are sent away — this is a Rabbinic restriction, not a Scriptural one.
Question 4
An impure person who becomes impure inside the Temple while there must do what?
Halachot 21-22 require immediate departure via the shortest path. Tarrying, bowing toward the Sanctuary, or taking a longer route — even at a run — each independently incur karet.
Question 5
What is the measure of 'tarrying' that makes an impure person liable for karet inside the Temple?
Halachah 23 rules, based on Shevuot 16b, that the prohibited tarrying is measured by the time needed to recite the bowing verse in II Chronicles 7:3 — the time of a single prostration in the Temple.