check sentences please

Hi,

1. We are going to hold/have discussio (or - a discussion?) on this matter now. -- I konw that a certain word trigger a need for a countable or a uncountable noun. Is this one of those cases?

2. Can you be able to take care of this?

3. I hope you would be able to take of this right away. -- what comes after 'hope' is normally a present or fututre tense?

4. Can you fix this handle of the door (or - handle to the door?)?  - when is 'handle to the door' is good and when is "handle of the door" is good?
He went in by the main door of (to??) the house.

Anonymous

Hi,

1. We are going to hold/have discussion (or - a discussion?) on this matter now. -- I konw that a certain words trigger a the need for a countable or an uncountable noun. Is this one of those cases?  Yes.

2. Can Will / Would you be able to take care of this?

3. I hope you would will be able to take care of this right away. -- what comes after 'hope' is normally a present or fututre future tense?  Yes.  I hope you are able

4. Can you fix this handle of the door (or - handle to the door?)?  - Can you fix this door handle?   Can you fix the handle on this door?      when is 'handle to the door' is good and when is "handle of the door" is good?   I can't find the / a handle to / on the door.     I meant to ask you to fix the handle of the door, not the handle of the vacuum cleaner.  ( On is good here too.)
He went in by the main door of (to??) the house.I hear both.  I prefer "of" in this case.