#30 -Can I target to ROME as (major)city
Yes, of course. Rome is a major city.
and #52- "any space" including major city or tribes space? or if there are sertorian units, still ok?
Yes and yes.
and #67-"... as if commandes by a legate."
this legate is unnamed legate? if not what is this card's benefit?
Yes, unnamed legate.