You can record a drumkit in good quality with only a bass drum mic and two condenser mics. For example:
For the two condenser mics a good matched pair like a pair of MXL 603s: (these get the cymbals and the majority of the rest of the kit)
And a great kick mic is the shure beta 52A:
And depending on what quality you want, you can buy an SM57 like the guy above said for the snare, individual tom mics are not really necessary for a good overall drum sound. Check out this
thread at homerecording.com for mic placement technique, using this will mean you can use these mics to get a really good sound without spending loads.