Just noticed this now -
The meeting is every Thursday, 8pm-11pm at Baza Wilda, ul. Gorna Wilda 89/19 - entrance from the side of the building. Ask for the "Couchsurfing/Language Exchange Club" meeting, or just ask people :)
Teaching is probably beyond your reach, too, if you don't have some sort of teaching certificate and/or experience. Teaching jobs are not as easy to get as they once were, and the good jobs are generally already taken by people more qualified and experienced than you.
It's a bloodbath in Poznan this summer - the good jobs are definitely only going to those already "in the know". I know at least two other people struggling to fill their timetable with work.
Try asking around, though, especially at the Callan Method, Direct Method or Avalon schools. The work is not very rewarding, and the pay is low, but there is a chance that you'll be able to make ends meet.
These are closing down by the dozen - one notable name to avoid is "Akces". I know one guy who was getting a mere 25zl/hour to go and teach corporate classes, shocking as it is.
Sorry, but there isn't much of a need for unqualified, unexperienced people who don't know the local language.
My suggestion would be to try and see if he can find a hairdressing salon willing to give him a chance - he might find that being "exotic" - someone might just be willing to give him a chance. But again - I can't see the money being particularly good.
The other thing (guessing by the name...) - being Scottish can also count against you here. People are looking for specifically English accents - Scots just isn't wanted. Personal experience ;) (and the reason why I speak quite neutrally...).