Solution:

Males : S, P, Q and U

Explanation:
Let's form facts with the data we have.
S is P's father and U's grandfather.
Therefore, P is a parent of U.
R and U are siblings and children of P.
Q is the brother of T's husband.
Now, we know that R and U are children and S is the father and Q are the brothers, we can imply that P and T are married.
This explains that P is also a male.

Therefore, S, P, Q and U are males in the family.

Solution:

Trunks.

Solution:

South

Explanation:
If you turn the picture upside down, you will see South.

Solution:

8

Explanation:
Mr. Scofield
Mrs. Scofield
5 sons
1 daughter(one sister of each brother)

Solution:

Inception.

Explanation:
Chemical symbol of
Indium : In
Cerium : Ce
Platinum: P
Iodine: I
Oxygen : O
Nitrogen : N

Combining symbols, we got Inception.

Solution:

Owl.

It's circled in the image below.

Solution:

The prisoner said, "I am telling lies".
This will create confusion to the warden as it's a paradox and can't be a lie or truth.

Solution:

The Letter "C".

Solution:

Ruppell's vulture generally found on high altitude and Mr. smith was on the plane. The vulture hit the plane and the plane got crashed.

Solution:

Sherlock Holmes

Explanation:
She + R + Lock + Home