In some of these sentences much is incorrect or unnatural. Change much to many or a lot (of) where necessary.
I use the phone (much) at work.
We’ll have to hurry. We haven’t got much time.
We didn’t spend (much money). OK
Sue drinks (much tea). OK
Jim always puts (much salt) on his food. A lot of salt.
We’ll have to hurry. We haven’t got (much time). OK
Did it (cost much) to repair the car? OK
It cost (much) to repair the car. A lot.
I don’t know (much) people in this town. A lot of.
I use the phone (much) at work. A lot.
They’ve got so (much money) they don’t know what to do with it. OK