Once the pigs arrive with you then you confirm the movement within three day, which you can do on eaml2. The vast majority of movements are done on line via eaml2 but some people do still use paper licences with approval though. The electronic system generates the licence, a copy of which must be given to the transporter and is kept by them.
Pigs under a year of age can move on a temporary paint mark between holdings but they do need your tag before they go to slaughter.
Yes, pigs can live out with an arc.
Don't take offence - people are so easily offended on here sometimes - but you can't learn about keeping pigs by posting questions on here. Read up or go on a course. By all means use the forum to help you along but please do some more homework.