MIX 1/4 cup (4 Tbsp.) flour, 1 tsp. paprika and 1/2 tsp. salt. Add to ribs; toss to evenly coat. Heat oil in large skillet on medium heat. Add ribs; cook 5 min. or until evenly browned, turning occasionally.
PLACE ribs in slow cooker; top with remaining paprika, salt, vegetables, garlic, pepper, broth and Worcestershire sauce. Cover with lid. Cook on HIGH 6 hours (or on LOW 8 to 10 hours).
REMOVE ribs from slow cooker; skim surface of sauce. Discard rib bones. Return meat to slow cooker with sour cream and remaining flour; stir. Cook, covered, on LOW 10 to 15 min. or until slightly thickened. Meanwhile, cook noodles as directed on package.
DRAIN noodles; place in large serving bowl. Add meat mixture; stir.