Eight of us go fourth, not back, to protect our king from an attack. What are we?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

How far can you walk into the woods?

When it is alive we sing, when it is dead we clap our hands. What is it?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

I have branches, but no fruit, trunk or leaves. What am I?