What does this Rebus Picture mean?

I have eight fingers and two thumbs but I do not live. What Am I?

Spot 5 differences in two Christmas tree below:

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

Can you write down eight eights so that they add up to one thousand?

During a secret mission, an agent gave the following code to the higher authorities
AIM DUE OAT TIE MOD

However, the information is in one word only and the rest are fake. To assist the authorities in understanding better, he also sent them a clue, If I tell you any one character of the code, you can easily find out the number of vowels in the codeword.

Can you find out the code word?

Imagine you are in a room with no windows or doors. How will you get out?

Through your logical capabilities, can you make 7 an even?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den