This is the exact same question that I wake up at 4 in the morning for.
Thanks to know that Im not alone.
That and others of course. Like what do Pans People look like now or hope my ex has chladymia etc.
Yes, all vertebrates have the same bones; just in different proportions. Humans (and apes) have lost some at the bottom end of their spine (ie, no tail) but all the other bones are there.
That's patently incorrect. Most mammals have the same types bones of bones in more or less the same place but, e.g. whereas humans have 12 pairs of bones, most dogs have 13 pairs etc.
Most birds and fish are vertebrates, but they have vastly different skeletons.