will give good effects since it is exalted

It will give more malefic effects since it is double strong being vargotama unless there is cancellation of deblitation

Moon chart we normally see for daily transits it cannot override lagna chart but planets placed well in moon chart can be activated for better results

It will give more results of 7 house than 8 house

sade sati is from moon sign always

we call it rashi parivartan have to see lordships of planets in exchange if good then good results

Exchnage of lord of 6 jupiter with lord of 4 saturn is always bad

marriage would be delayed

Sun will give less bhagya lot of hard work no results

it will hurt your profession and spoil your domestic life very much

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No it will give more malefic effects

Vargotama is only seen only from lagna not from bhava chalit chart

No they increase four fold their malefic effects

Yes it will be very negative and bad unless Mars is in Aries or Scorpio in lagna chart then negative effects would be minimum

Married life will not be happy and person would not be healthy and would not get much fame since lagna lord is very important