Since there is only one well-known production of Romeo and Juliet where Capulet ever dresses as anyone other than Capulet, you are probably referring to Baz Luhrmann's 1996 film of the play in which the Capulet party is imagined as a costume party. The costumes contain not-so-subtle comments on the characters in the play. Capulet (who is the head man of the Capulets) is dressed as a Roman emperor.
Romeo wears clothes most of the time (in Act 3 Scene 5 he is sometimes shown naked). Just what clothes depends on what production of the play we are talking about. Every director has every right to dress Romeo any way he or she wants. If you want him in a t-shirt and jeans, that's just fine.
Romeo was (and I feel this should be stressed) not a real person, so "he" didn't "wear" anything. You can look at a costuming manual (I recommend the one by Edith Head) if you want to know what a person in Romeo's purported time, location, and social standing would typically have worn, but as has already been stated, you're probably not having him speak 14th century Italian, so why should you feel compelled to make him wear 14th century Italian dress?
Whatever clothes he was married in. He came straight from the wedding to meet up with Mercutio, and that is when he met Tybalt, Mercutio was killed and Romeo killed Tybalt right afterwards.
The choice of the exact costume Romeo is to wear is up to the director and the costume designer of the particular production.
Every production of Romeo and Juliet is costumed differently, even those which are conventional. Therefore unless you are asking about a particular production, there can be no answer to this question. In case you are thinking of a particular production, here are some answers:
In the Zeffirelli film (1968), Tybalt (Michael York) wears a huge red hat like a deflated Basketball, a black doublet, chains around his neck and a red cape over his right shoulder.
In the Stratford Ontario production (1993), Tybalt wears a black military uniform of the style of the 1920's trimmed in gold, with a gold shoulder sash.
In the BBC production (1978) Alan Rickman as Tybalt wears a parti-coloured jerkin in cream and tan with tied on sleeves and a white blouse underneath, and a very silly looking pillbox hat (this seems to be the costume of the Capulet servants in this production.
In the Baz Luhrman film (1996), Tybalt (John Leguizamo) wears a black suit with a spangly red waistcoat and a pair of devil horns.
In the Thames/ A & E production (1976), Tybalt wears a green brocade jerkin with tied-on sleeves of the same fabric, a white undershirt and a pair of burgundy tights.
In the 1996 movie, at the ball, Tybalt wears this fiery red vest which says a lot about his character because his personality is very fierce and has a bad attitude.
Tybalt wears a drag outfit to the ball. The outfit Tybalt wears symbolizes Tybalt's personality, because Tybalt is the life of the party. Oh and it doesn't mean Tybalt is gay. He is not.
1500's italian clothing.
It totally depends on the production.
leggings vest
Capulet prevents Tybalt from fighting Romeo at the party.
tybalt recognized romeo at the party
Tybalt recognizes Romeo, a Montague, at his uncle, Lord Capulet's, party, and believes Romeo intends to insult the Capulet family.
annoyed
Tybalt wants to fight Romeo... :)
Tybalt was upset at the party because Romeo arrived at the Capulet party. Tybalt believes that Romeo is mocking him and the Capulet name by arriving at the party. He attempts to fetch his rapier but his uncle, Lord Capulet stops Tybalt.
Capulet prevents Tybalt from fighting Romeo at the party.
tybalt recognized romeo at the party
challenge him to a duel for attending the Capulet party without an invite.
I think Lord Capulet say to Tybalt, come down .Because he don't want people to fighting at his party.
Tybalt recognizes Romeo, a Montague, at his uncle, Lord Capulet's, party, and believes Romeo intends to insult the Capulet family.
annoyed
Tybalt reacts with anger and challenges Romeo to a duel when he recognizes him at the Capulet's party. Lord Capulet, however, intervenes and tells Tybalt to let the matter go, as he does not want any trouble at the party.
Tybalt left the Capulet party in anger because he recognized Romeo, a Montague, at the party and felt disrespected that a member of the rival family would crash their celebration. Tybalt was known for his hot temper and loyalty to the Capulet family, so seeing Romeo there incited his anger.
Tybalt wants to fight Romeo... :)
This would be Tybalt. Of course Capulet is really only his uncle by marriage. Tybalt is Lady Capulet's brother's son. Tybalt does not actually plan to ask for Capulet's permission to throw Romeo out; he calls for his rapier without consulting Capulet first. It is only when Capulet asks him what the heck he thinks he's doing that he explains himself to Capulet.
Yes Tybalt is a Capulet he is Lord Capulet's nephew.