4.5 quarts. Plenty big enough to make a cake. Most home baking single recipes will fit in this mixer as they were developed for home bakers and this is the mixer that is the most common in the home for over 50 years.
Yes you can use a meat grinder attachment. The only issue is that if you put too much load on it, it will strip out the gear inside and you will have to pull it all apart to change the gear.
Hi Rema, The flat beater part number is K45B, dough hook is K45DH and the wire whip is K45WW. Please check with your local retailer for the accessories availability. Please contact KitchenAid directly at 1-800-541-6390 for the front hub cover.