My 93 Previa is idling (really) high in P and N. And running poorly in general.

What is your question?

And sometimes in D it lags and surges. Or if I'm cruising at around 45-55 and let my foot off the pedal it seems to drag......like I'm slightly braking. This all began after I was having starter issues, which I've seemed to have fixed. Although the starter seems to stick a little still. My mechanic replaced the TPS but that didn't do much. At 195k it's never really had a problem....but I will say for the past year or so if I punch it it definitely bucks around. Seems I need to ease into high speeds often. Thoughts?