Hi from a fellow Scot! I did this trip in 2012 and it remains my favourite of all the JY trips I have done. It is a very full on tour and you will be amazed at the sights and sounds of India.
If I remember correctly I took £500 with me. You can not get rupees here so you have to change sterling(Bank of England) notes in hotels. There are ATMs available but they were few and far between. This may have changed! Debit and Credit cards can also be used. I spent more than I had taken with me but I did buy a number of souvenirs!!
I suggest you take cropped trousers and t-shirts or loose dresses for daytime and dressier tops and skirts or trousers for evening.
I hope you have a great holiday and if you have any other questions please ask.
Lesley