There isn't a way of restarting, however if you still have ovens and a few tables then just keep on cooking and you will reach upto the next level. By then you will have atleast 3,000 coins. So you...
Sorry, you can't. But if you have 2 apple devices then you can swap the bakeries. I'm not sure how, but you can google it. :)
Sweetsmeh
The soda machine is only in Restaurant . It costs 10,000 coins but you need friends to send you the part needed
Restauraunt Story, Tiny Chef, diner dash.