Help through the transition period?

As the title asks, is there any help out there to help us through a transition. Thankfully, my 16 year old son has been accepted as a apprentice with a large company. I am a single parent who was claiming Income Support, I am also my brother's Carer, therefore Carers Allowance was being payed. I received Child Benefit and Child Tax Credit (All under the Scottish system). Since my son left school in the summer and commenced the Apprenticeship this month (minimum apprentice wage applies), I have advised all the benefit departments of this change. So, obviously CB and CTC has stopped. My quandry is that My son is being payed monthly, his bus fare to work is £17 per week and he has to attend college on Monday for a week which will cost £35.50 (the cheapest way I can find for him to travel). I am overjoyed that he has this opportunity but, he is not payed until the 25th of the month and it is a struggle to get him to work. Is there anything out there that can help us through this time. Your replies are much appreciated.