as for the diet, a good brand of complete biscuits, with meat as an extra is the usual. i use royal canin biscuits, felix pouches & occasional bits of boiled chicken or fish for treats. they love their meat but do need a more complete diet.
as for hiding your brushes
she is probably playing with you. they make up their own little games...fetch is quite a favourite. they also love water (most of them anyway). if you put a washing up bowl down with a couple of inches of water in, you may find she will splash about in it or try & "drown" some of her toys. they really do like to be kept amused but can bring you much entertainment in the process.
messing in undesired places can have many causes...it is a way of them communicating. there are a few threads on here covering the subject, if you use the search option in the top right corner you should find some useful info.
2 more weeks? me gets the feeling you will be so in love by this point, you will want your own one
if you have any more questions please don't hesitate to ask! most of us on here are completely bengal obsessed & are happy to chat away about them non-stop