When I was a child. When I was a child.

This isn't a complete sentence

When I was a child. When I was a child.

Not really a complete sentence...

I need to buy some sugare. I need to buy some sugar.

I need to buy some sugare. I need to buy some sugar.

I need to buy some sugare. I need to buy some sugar.

I had twosome coffee yesterday. I had some coffee yesterday.

Could also say “I had two coffees yesterday” but I think that’s a more casual/spoken term and not really grammatically correct. So for writing I’d stick with using “some” of “a lot of” in front of coffee

I had two coffees yesterday. I had two coffees yesterday.

I had two cups of coffee yesterday. I had two cups of coffee yesterday.

I found asome hair in my soup. I found some hair in my soup.

MThere are many cars. There are many cars.

Many cars. Many cars.

Not a complete sentence...

I have some questions for you?. I have some questions for you.

The original sentence sounds a little like you’re questioning whether you have questions. But if you were to use the original sentence in a conversation or a situation with more context then it could still make sense to the other person since it kind of implies that you’re asking if you can ask the questions. If you still want to write it as a question you could say “Can I ask you some questions?”

I have some questions for you?. I have some questions for you.

I need to have somea few cups of coffee. I need to have a few cups of coffee.

“Some cups of coffee” doesn’t sound particularly natural to me but I’m not sure why or whether it’s acceptable grammar.

Is there any sugare in the jar? Is there any sugar in the jar?

Overall it was well written

Is there any sugare in the jar? Is there any sugar in the jar?

Is there any sugare in the jar? Is there any sugar in the jar?

A few/ hHow manyuch tea do you want? How much tea do you want?

Many is used with plural nouns (for example, “How many cups of tea do you want?” but tea isn’t plural. I’m not entirely sure what you meant with the “A few/“ part so if possible could you clarify what you meant then I can try giving you some feedback.

A few/ hHow manyuch tea do you want? How much tea do you want?

A few/ hHow manyuch tea wouldo you wantlike? How much tea would you like?