Lots of "run for your life" type responses, not that there is necessarily anything wrong with that.. Bear in mind a lot of houses have cracks in them, whether they are serious depends on the type position and number and it is up to you whether you get a structrural engineer in to do a report.
The mottled bark on that tree suggests it is either a plane tree or a eucalyptus tree. If it is a plane then this is a type of tree that is linked to cause ground movement nearby. If it is a eucalyptus then probably not.
The only photo that gives me concern is the one with the small step cracks on the brick, photo 4, where is that in relation to the tree? The others appear to be in the render or internal plaster walls only, see, they don't continue to run down through the brickwork? Straight vertical and horizonal cracks in rendering only.
Walk around the house, are there several courses of bricks that you can see all the way around the house near ground level? Is there any cracking in any of those? There's your answer. If subsidence there will be cracking at this place, if there is movement (this is not the same thing as subsidence) there will not necessarily be any cracking at this point of the house but that would mean there is an issue with movement in the house not caused by the ground moving. Do other tests: do doors close, do windows stick when closed? This looks to me like a house which poorly applied plaster and rendering rather than subsidence.