1. Milk can be consumed raw.
2. As to how much they eat, it depends. Mini goats will eat less than big ones. A milking goat needs more feed than a dry goat. Get a good book on goats and it will tell you how much feed they need. The Storey books are good for beginners.
3. They do need their feet trimmed about every six weeks or so.
4. They should have access to a mineral supplement. The kind of mineral will depend on what they are fed. Goats fed primarily on alfalfa will need a different mix than those fed a grass hay.
5. Goats need high quality hay. Meaning fine stemmed, leafy, and free of dust or mold. Otherwise they will waste more than they eat.
6. Most livestock, including goats, will generally leave poisonous plants alone. They exception is if they are underfed and then out of desperation they may eat things that are toxic.
7. As for care, they need to be fed regularly. They need access to plenty of clean fresh water, a salt block, and loose minerals. They should be vaccinated with CD/T to prevent tetanus and entertoxemia. Occasionally they may need a dusting of louse powder. The need their feet trimmed about every six weeks.They need a dry place to sleep.
8.Lots of work like a horse? I have no idea what you mean. I never found my horses took a lot of work to care for them properly.
9.Smelly like rabbits? My rabbits were never smelly. Any animal will be smelly if it is kept in dirty quarters with wet bedding and inadequate ventilation.
9. Unless you tease and torment them they are not mean. They same can be said of most other animals.
10. If you plan on breeding them, you will need access to a buck. For just a few goats it makes more sense to buy stud service than to own a buck.
11. We ate the excess male kids and sold the females.
12. The best breed is the one you like.
13. Storey's Guide to Raising Goats will answer your questions on space and a lot of other things as well