Hey there, congrats on the 10 month old! They are so cute at that stage!
1. My boys would eat as many puffs as I would give them (along with anything else) ...so I only gave them one handful each (my size handful, not theirs) and then decided later if I thought they were truly hungry still, or just being lummoxes.
2. We've always gone to the library. We are a homeschooling family and its very important to me to keep them challenged and "ahead of the game" so to speak... My youngest is - well technically my youngest is going to be here in June but my youngest that resides outside of my tummy is 17 months old and I check library books out for him just as much as anyone else. Libraries are wonderful, and the best part is that you can swap out the books on a regular basis. *Remember* for your little one, to wipe down any books you give him to play with independently. I wipe all of our books, cover to cover, binding and I flip through the pages to make sure there isn't anything yucky on them.... there never is. But just check. With board books you can safely wipe the entire book. It sounds like a lot of trouble but... its worth it to me.
3. I've always let mine hold a spoon. Even while I fed them. I get one, they get one. No harm, and it helps them learn a little independence and fine motor skills practice.
4. I love baby gates and I will use them until my children are tall enough to hop over them like any adult can. Even a 5 yr. old has to waddle over one carefully... an easy way for me to buy some extra time to hear racket going on or to ask "Where are you going?"
5. I have no idea on this one. I do know that my 17 month old has had several colds this season, and during a flare up I will put rolled-up beach towels under his crib mattress to elevate him at an angle a bit to help with sinus drainage. This cuts down on his stuffy head, bad night time cough and I don't have to use a pillow (he loves to sleep on his tummy and it doesn't seem comfortable)
6. You can't unless you only give him one or two at a time. If they dissolve, there might not be much harm in letting him have several at once. But I would set out a large handful on a plate or in a bowl and then give them 3 or 4 at a time... otherwise they'd wolf them down in three seconds and be upset that they were all gone.
7. I had the same problem. As a matter of fact, my 17 month old will STILL eat the Stage 2 Bananas - NOT the stage 3 and NEVER real bananas, even mushed up, even pureed.... nothing. I let him eat the Stage 2s because in my opinion... its healthier than pudding. I switched all of mine to table food right around 9-11 months, I'd cook it longer to make it softer and then mash it up with a fork and season it just a teeny bit with salt and light pepper. It tastes better and they liked it a lot more than anything else.
Hope this helps! You should get some good advice on here.. take it with a grain of salt, and toss out what isn't useful!
Best of luck to you!