Yes, I do this all the time with my wife’s old Technics FM tuner.
Not unless you have one of the “magic” Mic-ins that auto adjusts if you attach a line-level source. Otherwise you are likely to need an external soundcard- see this sticky thread: Sound Card Reviews
I use the Edirol UA-1EX (discontinued) in conjunction with the Technics ST-X902L produces excellent results/
WC