CREATE TABLE table_36088 ("Home  ( 1st leg ) " TEXT, "Home  ( 2nd leg ) " TEXT, "1st Leg" TEXT, "2nd leg" TEXT, "Aggregate" TEXT)

What aggregate has a 0-0 1st leg, and is from Instituto?
SELECT "Aggregate" FROM table_36088 WHERE "1st Leg" = '0-0' AND "Home (2nd leg)" = 'instituto'
SELECT "Aggregate" FROM "table_36088" WHERE "1st Leg" = '0-0' AND "Home (2nd leg)" = 'instituto'