Could You Check?

Hello. Thank you for always helping me out.

Today, I would like to know whether these below (in bold) make sense.
If they matter, please give me some advice for them to be better.


1. You need not be afraid of more things than you should/must.

2. You need not be afraid of more things than you should/must be.

3. People will (often) be afraid of more things than they should/must.

4. People will (often) be afraid of more things than they should/must be.

5.
A: Every day, I have to cook three times for my children. It’s hard.
B: That sounds tough. You might now be in need of more money than you would in autumn when school starts.


Thank you.