Hey all!!

Ever since I bought my '97 Previa about a year ago and after driving it for a year theres a couple things I've picked up on.

1). That common annoying whistling sound when accelerating.
2). Sometimes there is a faint burning smell after I drive. It's not always present, it comes and goes, but still it happens and need to know what it is as this never happened to me before on my '94 Previa.

After much internet research I was finding what the problem was, but it was usually too complicated for me to follow (not that mechanically inclined lol).

Solutions:
1). something about my SADS and needing to change the bushings?
2). No idea, there were actually various solutions to these and I don't which one to do or what to do.

Can someone explain and "dumb down" for me what needs to be fixed? I plan on keeping my '97 Previa till death do us part and its pretty young sitting at 78k miles so I know it has a lot of life left in it. Can anyone help me out?