Pointing to things - very early on.
Talking - he was making vowel sounds on day 1, I could understand a lot of his words a few months in, he was copying me... not sure. Did he ever mimic me? I know I mimicked him trying to force him to copy me because he "should" but didn't want to. He was saying words by age 1 year though. At 18m his vocab was short sentences, mostly about Thomas trains, but sometimes about food. He could name important people as well (parents, grandparents, nursery carers).
Animal sounds - I really can't remember. Probably age 2 when he understood the concept.
Block stacking was 10-11m. DS's godmother bought him some large magnetic blocks, so they were easy to stack, so he developed confidence to do wooden blocks with those (and was doing those before 1 year).
Taking off clothes - if socks counts, very young (as are most). Getting himself undressed, maybe once or twice before he was 2: he wasn't overly fussed. Once he got the naked joy though, he stripped off a lot.
Putting on shoes - He didn't wear shoes much when he was little, and even now he can sometimes get stubborn and refuse to put on shoes. I didn't really demand it of him until he turned 4 because of the hassle involved: he only wore shoes when we were going out for a trip and at that point I just wanted to get out the door.

I will add - my son weighs a lot less than he "should". Thankfully most of the child health nurses around me understand he's just skinny and that the "average" has an under and an over curve and it's OK to be not average. Most children are not. So it's fine your son isn't "average" - in fact, I don't think anyone should be. How dull to be so predictable!