This Q & A format provides for editors to answer one question at a time, but yours asks for seven answers. I'll answer one for you, and you don't have to look hard for the line chosen.
The opening line of the play, spoken by the chorus, uses iambic pentameter. Here's the line with the stressed syllables in bold.
Two households both alike in dignity,...
The line contains five metrical feet in ten syllables. Each metrical foot is an iamb: an unstressed syllable followed by a stressed syllable. If scanned, the line would scan like:
-/ -/ -/ -/ -/
The play is written predominately in iambic pentameter.
By the way, you'll get more responses to your question if you break it up into seven different questions. Answering seven questions in one is a daunting task for any editor.
Alliteration is the repetition of initial consonants. This is shown in Act I scene III by Juliet in the following lines:
The repetition in this case is the letter L. Juliet explains to her mother that she will simply gaze at Paris and try to like him, but she won't fall for Paris anymore than her mother's permission allows.
Personification is identifying inanimate objects with human characteristics: "It is the east, and Juliet is the sun!"