#2 is indeed just a function of having a flat boxer engine. Oil can seep into the combustion chambers when the car sits for a while, which then gives you a puff of white smoke when you start up.
#3 is the cold start system. The car will idle high at first until it warms up a bit. In the old days we used to have to pump the gas to start our cars and then keep our foot on the gas peddle slightly until the car warmed up. The modern cold start system does away with this nonsense as the car does it for you. So this is a "feature" rather than a problem. 
Kirk
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2000 Boxster S - Gemballa body kit, GT3 front bumper, JRZ coilovers, lower stress bars
2003 911 Carrera 4S - TechArt body kit, TechArt coilovers, HRE wheels
1986 911 Carrera Targa - 3.2L, Euro pistons, 964 cams, steel slant nose widebody
1975 911S Targa - undergoing a full restoration and engine rebuild
Also In The Garage - '66 912, '69 912, '72 914 Chalon wide body, '73 914
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