Theres a word that means many things to many people. I think 90% of the answers so far have been given towards joinery rather than cabinet making.
On chisels- if you’re not doing detailed stuff a basic set will see you right. Even skilled cabinet makers are happy with Lidl and Aldis offerings for basic work, I got a set of Bahco 434s and they are spot on (even if I did chip one on a hidden nail). As said you need to learn how to sharpen them as well, get a good edge and any chisel will be several times better, usually second hand tool shops are good places to find old Marples chisels (ended up bought over by Irwin along with Record vices) for a couple of quid at most. Good for practice if nothing else.
Sometimes cheap is fine, Silverline is okay for stuff that doesnt need precision like mallets and such. I ended up paying more for a Stabila level though as I wanted something I could rely on.
As always ukworkshop is the forum to head to, they have plenty of advice threads and such to read that will keep you right.