Recently acquired Acer palmatum var., (burgundy lace) atropurpureum - HELP

Recently acquired this acer from a garden center as a 'troubled tree' for an 80% discount! What should I do first?
1. Do I remove all obviously dead branches and chop the trunk?
2. Do I need to do anything to the soil other than remove the dandelion?
3. Should this tree be treated? Some of the leaves are curled and have obvious sun and wind damage...
Any suggestions would be much appreciated! Thanks, David

You certainly can remove the deadwood but you won't want to chop the trunk unless you have a definite plan for the tree that calls for a trunk chop. Take off the dead stuff and see what you have then. Post some more pictures. It's probably too late in the year for much soil/root work. Don't fret too muh about damaged leaves. You just got the tree nd it's not a bonsai yet.

Water carefully (don't leave the soil wet) fertilize a few times (read the label), and bring the tree to health this year.

Thanks Jim. Do you think I should remove the top part of the trunk which is dead?

I'd remove ALL dead parts.

Again I thank you for your input. I observed a great number of small spiders, larger than spider mites. I was wondering if these could have caused the die back. I sprayed with insecticidal soap and they literally rained out of the leaves. Should I use a systemic also?