Here are answers for my country:
1. I'd say they're on time 60% of the time. You have to flag down buses at bus stops, or they simply won't stop!
2. It's normal to stand in line. Some taxi ranks have strict queueing rules and even a conductor, due to some recent deaths caused by drunken fights over a taxi.
3. At peak hour, buses are full but not packed. There is a set limit of people allowed on a bus, and the driver has the right to refuse passengers and ignore stops if the bus is full.
Buses and taxis follow strict regulations in my country. It's also normal to thank the bus driver when getting off the bus.
4. If you have a cheap flight, then you need to buy another ticket. If it's with a major airline, they're a lot more flexible and will even work with other airlines to get you on your way.
5. Trains are more reliable than buses. I've rarely encountered late or missing trains at home, but I know it can happen during peak hour.
6. Yes, we need to change but I can't recall where. Perhaps Hawaii or Los Angeles, or both.
7. If it's a quiet residential street, then yes you can park in front of your home. For busier streets, you would need to park somewhere else, or at least in your garage. Even if you live in an apartment, one parking space is usually reserved for you, on the property. People who live close the the city centre but don't have a car usually rent out their parking spot to workers in the centre.