1-4: edecán: a corruption of the French aide-de-camp.
1-5: Sr. D.: Señor Don.
1-6: toitico = todito, diminutive of todo. This diminutive ending often adds emphasis.
2-1: a que = para que.
2-2: se persigue: they have pursued. The perfect tense value is often represented by the present (and the pluperfect by the imperfect) after después or hace (ago).