Hi.

I don't know anything about introductions because I haven't been in that situation but I got a kitten about five weeks ago and they are quite expensive. If money is a problem then I would say that you need to think about it a bit more.
Basically, you will need to give your new kitty her jabs (if she hasn't had them already) and they cost me £25 each (she will two and then one a year).
I buy Whiskas Kitten Dry Mix (can't stand the smell of wet food lol) which is £1.08 for 375kg.
Other things that your kitty will need are:
water and food bowl (I use an old dish)
a scratching post (cost me £13)
a few toys

I am not trying to put you off and would enthuse you to get a kitty - they are lovely Also, if you really want one then you will find the money. I'm a writer so you can imagine that I don't have much money but I always find the money for my lil baby

Good Luck and let us know if you decide to get one. I hope this helps