O Levels 2210 Computer Science Pre-Release: Senior Citizens Trip Organizer
There are a few things to improve:

Task 1


the initial validation check is not correct. You are checking for a minimum number of people to be more than 2, while the error message says the minimum is 10: 


  Sorry the range of people is 10 - 36. Please Try again.

I would use an inclusive ranges for readability. Also, you can use the chained comparison:

if 10 &lt;= number_of_citizens &lt;= 36

you can use a short if/else form when defining carer:

carer = 3 if number_of_citizens &gt; 24 else 2

to avoid over-nesting things, I would handle the "negative case" first:

if not(10 &lt;= number_of_citizens &lt;= 36):
    print('Sorry the range of people is 10 - 36. Please Try again.')
    exit()

carer = 3 if number_of_citizens &gt; 24 else 2

don't hardcode the coefficient values for costs and hires, define them as constants, or better in a separate configuration file or module


Task 2

Some of the things from the "Task 1" can also be applied here as well.


when you have a throwaway (not used, but syntactically needed) variable, it is agreed to use _ (underscore) variable name
looks like you don't have to keep the amounts in a list and can simply calculate the total amount, while only collecting names into a list
the range() starts at 0 by default, you can avoid specifying 0: 

for _ in range(total_people):
     # ...



The definition step then might look like this:

names = []
total_amount  = 0

for _ in range(total_people):
    names.append(input('Name: '))
    total_amount += int(input('Amount: '))



when you print out the names, you can loop over the names in a list directly instead of looping over indexes:

for name in names:
    print(name)



Task 3


the break_even_value variable is set but never used


There were also some PEP8 violations in terms of code style, like missing spaces around operators or extra spaces after the function calls. Install a linter like flake8 or pylint to catch this kind of common violations.