Is calcium still recommended for pre-menopausal women?

Yes. All women should get adequate calcium for bone health. Premenopausal women should get 800 - 1000 mg/day. As with many important nutrients, too much of a good thing can become a bad thing and high doses of supplemental calcium can increase risk of heart disease. It is best to get calcium through food sources rather than supplements. If using supplements, use low doses with food.
Yes, in the diet. Dairy products and broccoli are naturally calcium loaded. Dietary calcium pill supplementation should not exceed 2000 mgs/day to avoid calcium induced kidney stones.