Pup, this is too big a problem for AA to handle. What your
friend needs is to speak to a professional, or a teacher who can
contact the appropriate association to help him.
For his pocket money issue, your class can help out by raising
money for him via the class fund, or make it into something fun for
all to do, having fairs/stalls/sales to raise money to help
him.
When a young person is suicidal, problems seem way too much for him
to handle, & looking at your friend's situation, I can see why.
At his vulnerable state, suicide may seem to be a good way
out.
Please ask him to seek help urgently, before he becomes totally
overwhelmed by it all.
FeowFeow