The play begins with one of the most often quoted paradoxes:
Fair is foul and foul is fair.
A paradox is a seeming contradiction, and this line spoken by all three witches at the end of the first scene suggests their deceptive nature--nothing is what it seems to be.
Examples of personification are more difficult to find perhaps because they are more scarce. But one example of giving inanimate objects human characteristics might be in King Duncan's speech:
My plenteous joys,
Wanton in fullness, seek to hide themselves
In drops of sorrow.
Here Duncan is ascribing human traits to his happiness that is disguising itself with his tears (of joy).
Alliteration is the repetition of the first consonant sounds of words that are close together. It serves as a type of verbal highlighter that emphasizes key ideas. Alliteration is quite common throughout the play. One example is Macbeth's speech in scene 4:
Stars, hide your fires;
Let not light see my black and deep desires.
"Deep desires" is an example of alliteration suggesting Macbeth's murderous inclination. This line, by the way, is also filled with assonance--repetition of vowel sounds. Look how many times the long i sound, as in "eyes," is repeated.