id imagine the smoking is from dried up valve stem seals, like bryan said... just due to age ...
the car is almost 20 years old!!! and even a showcar kept indoors cant escape deterioration...
thats what time does....
the small rubber seals harden like a rock and lose there seal ..
small amounts of oil bypass and cuase smoking...
id drive it till it dies, and then rebuild and reseal the whole engine. but thats just me...
shaking in reverse???
auto or 5 speed??
auto, check your mounts like daryl said
5 speed, check your clutch and flywheel
do a "high load test" (floor it in third)
check for clutch slippage...