G.T.
When my twins girls were born my son was 13 months old. To answer your questions.....
--I had a double umbrella type stroller for the twins and the toddler either walked along side holding on to the stroller, or I had a single stroller for him that someone else pushed. Most times I didn't go anywhere with all 3 without help though.
--Since I also had 2 older children (ages 10 and 11 years) we had to buy a van that seated 8. There was a seat for each kid and plenty of storage room in the back.
--Yes, you will need a different type of diaper bag...you will need a BIG one. Even if you take a change of clothes for each and diapers it adds up. I had one made for me that I loved. It was just a cloth bag with big pockets to help keep it organized, but it was big enough that it held everything I needed.
--All of my babies wore cloth diapers until they were 3 months old. That's when I had had enough and went to disposables! How many diapers should one person wash a week? Not that many, that's for sure!
--I never had any of my children sleep in my bed. I wanted all of them to learn to sleep in their own beds right from the start. The twins shared the same crib until they were about 6 months old though. All 3 of my little ones shared the same bedroom until my son learned to climb out of his crib and would wake the twins. That's when he got his own room.
--Free time? What's that? Don't plan to have any free time for the first 5 years! Just kidding! Now is not the time to make any big changes in your lifestyle. Wait until the babies are born and you have settled into a routine to see how much time you really have. But keep in mind, that the minute you get settled into a routine, something will change it and you will have to start all over again.
--I bottle fed all my babies due to the lack of milk production, but I know several moms of twins that have successfully breastfed twins. At least for the first few months. Most of them got a breastfeed pillow made just for breastfeeding twins to make it easier.
--Having twins is considered a "High Risk Pregnancy" by most doctors and it is not recommended that you do home births. Too many things can go wrong that usually don't happen with a single birth. The first being that, on average, twins are born 3 to 4 weeks early and are usually smaller at birth and may need a little extra care.
All that being said, my biggest advice is for you to find a local "Mothers Of Twins Club" in your area and go talk to experienced moms who have all "been there, done that". They will be able to give you EXPERT advice and little tips and tricks to make life easier that no mother of singletons will understand or know about. And even the doctors don't know about most of them! I joined our local MOTC right after my twins were born and really don't think I would have made it without their help. You can find a local club on this site: http://www.nomotc.org/
Good luck to you. I sure hope I have helped you even if it's only in a small way. You are going to need all the help you can get! haha