You have my consent: Orlando assumes the role of the bride's father

brother: brother-in-law, as future husband to 'Aliena'

sister: perhaps Oliver is pretending that Ganimed is Orlando's Rosalind, or perhaps he has seen through the disguise...

scarfe: sling

sound: another word for fainting; how Ganimed pretended to faint

greater wonders than that: i.e. Oliver's falling in love with Aliena, based on Ganimed's/Rosalind's response (but perhaps, they were truly discussing Oliver's thoughts or discoveries of Ganimed)

where you are: what you mean

reason, but they sought the remedie: Oliver's reason (phallic erection) makes him want to "do reason" (copulate) with Celia, who like-wise seeks love's remedie (sexual intercourse).

degrees: stages, steps

paire: flight

climbe incontinent: ascend immediately

bee incontinent: be unchaste, unable to resist their sexual appetites; If they don't marry soon Oliver will "climb" (sexually mount) Celia's "downstairs" (female pudendum, cunt) before marriage.

wrath: passion; Clubbes can part (separate) those in wrath (anger, fury), but Oliver and Aliena are in such wrath (passion, love) that Clubbes cannot part them.

Clubbes: the weapons used to control rioters

bid: invite

Duke: Duke Signor

having what he wishes for: sexual implication, with what meaning female pudendum.

turne: needs; Orlando feels that Ganimed is no longer enough to "serve his turne" (satisfy his needs). Only the real Rosalind can serve (sexually serve) him a turne (act of coition).

if you please: with possible play on please meaning "gratify sexually"

strange: wonderful

converst: associated; perhaps it was this conversation (sexual intercourse) with a Magitian (hermaphrodite, bisexual, or a witch) that made Ganimed able to explore his gender presentation.

Art: knowledge of magic

not damnable: practicer of white (for the good of others), not black (for the harm of others), magic; though the practice of any form of magic was liable to judicial condemnation during the reign of Elizabeth I, many people would commonly practice forms of white magic through superstitious items which were meant to provide protection, protective spells, etc. 

neere the hart: genuinely, sincerely

gesture: behavior

sober: serious

best array: put your best clothes on; most Elizabethan brides and grooms did not buy new clothing but simply wore their best clothing to the wedding ceremony.

bid your friends: invite your family and friends