Answer 1

For i in range(1,5):
Input("enter number {0}". format(i))

Answer 2

I would also recommend to convert the numbers from input to int or float. I have taken the 2 mentioned for loops and did it with a comprehension:
inp = []
[inp.append(int(input(f'Enter {x + 1}. number: '))) for x in range(4)]
print(inp)

Answer 3

OK - here is a more simple code. It takes the 4 inputs and stores them in a list:
inp = []
for x in range(4):
inp.append(int(input(f'Enter {x + 1}. number: ')))
print(inp)

Answer 4

[Input() for i in range(4)]

Answer 5

for i in range(4):
a=input("enter number"+str (i+1))