No, it is not correct to say "those ones." "Those" is already a plural determiner, so there is no need to add "ones" after it. Just saying "those" is sufficient: "I like those books."
'Those ones' is redundant, and it has a very unsophisticated, uneducated sound. Not that we should worship sophistication. You would do better to avoid 'those ones' or 'these ones' unless you are just talking casually with friends.
this one --> these ones (or merely these). seems fine to me.
No, it is not correct grammatically. The correct phrasing would be "Should I take these?" or "Should I take these ones?"
No, it is not incorrect. You could say, "These ones are the best for baking."
It is correct to say "those children", not "this children". You can also say "these children".
No. It would be better to just say those or these.
Yes
'Those ones' is redundant, and it has a very unsophisticated, uneducated sound. Not that we should worship sophistication. You would do better to avoid 'those ones' or 'these ones' unless you are just talking casually with friends.
this one --> these ones (or merely these). seems fine to me.
"One" can be a pronoun, but I think I would use "those" in this instance, too.
No, it is not correct grammatically. The correct phrasing would be "Should I take these?" or "Should I take these ones?"
No, it is not incorrect. You could say, "These ones are the best for baking."
It is correct to say "those children", not "this children". You can also say "these children".
No, "ones" is not correct when referring to an individual person. "Ones" typically refers to a group or category of things. To refer to an individual in the singular form, you would say "one is."
No, it is not correct. The correct way to phrase it would be "Thank you to all of you."
No. The best I can assume you are trying to say is, "Those guys." As in, "Those guys at the garage did a great job on the repair!"
It would be more accurate to say "Can you proceed with these?" or "Can you proceed with these ones?" for better clarity.