I'll answer your questions from my own experience with my LG, but it's not 100% the same for everyone
1) smile at 3 weeks after a very rough night, I was pooped and not so happy, got a 1000watt smile and a gurgle
2) Laugh round about 8 weeks I think (didn't write that one down) but I knew I was starting to wonder if we weren't very funny!
3) Hold her own bottle, hmmm, tough one because she still doesn't really do it. Just her juice or tea straw cup for about a month now (so started at 10 months)
4) Bumbo we only bought a second hand one at 5 months, so she sat it in only for eating times)
5) Baby sounds, always but more at 3 weeks.
6) Start teething, teeth moved into gums at 5months, first tooth at 9m2w2d, second 2 weeks later, 3rd 3 weeks later, 4th today
7) Sit, she only started sitting on her own at 7 months
8) crawl, 7 months
9) walk, 6 days before 11 months and now about 3 weeks later she walks 60% of the time
10) first word was mamma, she was 7 months. She still doesn't say certain words correctly but I know what she means, words include (we are afr) Ai toggie, mamma, kyk daar, toet toet (for the train) broem (for the car), sasa (for sasha the dog) ba (for simba the cat or sheba the other dog) krokodil, woef and teddie.
11) I demand fed B milk whenever she wanted something, in hot days of summer she had water but I only started normal rooibos when she dropped her 3rd bottle so from 9 months
12) B started eating at 5.5 months the baby led weaning way, so no spoonfeeding.
13) bigger teat size, the moment she took longer and seemed to struggle to finish a bottle I poked another hole in her teat, she had 4 holes before 6 months and saved loads of moola
She 11.5 months now