Probably not...
If your house plumbing is put together right rainwater won't go into the septic system. A properly designed septic system only takes "waste water". Story water is supposed to drain away from the house or into a "sump".
Yes, if it's classed as an attachment to a house. No, if it's an essential part of the house.
A sewer is a common drain line that connects multiple lines or houses that the city maintains. Septic tank is for one house that in on that property and the owner maintains.
The "septic system vent" you are referring to is not actually attached to the "tank" (that would be the buried, holding chamber in your yard) at all. It is attached to the plumbing in the residence before the septic system. If you look at the HowStuffWorks page, you will find a diagram showing where/how the vent works. Due to the way the septic tank produces gases, caused by the breaking up of the bacteria in the tank. Filters and drain traps are put into the houses plumbing system that is designed to hold water in the lower loop and block the gases from flowing back into the house. Most houses on a septic system will have the vent pipe(s) on the roof of the house and this is where these gases are released, rather than going back into the house. Now obviously, if you have gases coming into your house, you got a problem and should definitely consult a plumber
No
A section of land with the proper size and soil conditions to support a septic system for a 3 bedroom house.
Unplug the pipe between house and septic tank first. Get flow of septic into the tank.
Yes, if your house has a septic tank water from the sink and bath will eventually goes to the septic tank. However if your house is equipped with a fully dual grey water/black water sewage system, water from the sink and bath will first go to the grey water storage tank, the toilet will fill its tank from the grey water storage tank then flush through the black water pipes to the septic tank.
It is connected through the main house drain to septic tank.
The drainfield is usually not functioning adequately when a septic system malfunctions. When a septic tank overflows, the effluent might overflow into the drainfield and block the pipes. This produces backups in the house's sinks and toilets. Slow draining toilets and drains, sewage odor, moist area on or near the drainfield, or tainted well water are some of the other indicators.
It wearies on the depth and whith.
It depends on what is going on with the system. If it is operating normally and you are getting an odor out of the roof vent there are filters available that can reduce the odor. If your system is failing IE. foul smelling water coming up out of the ground call in a septic service professional. If you are getting sewerage odors in the house you should not be as they should be prevented from getting into the house by traps on each fixture in this case call a plumber.