Regarding your choice of keywords, focus mainly on relevance rather than on how busy a search term might be. Bid on all words and phrases you can think of that are likely to send well-targeted traffic, then just let the system display your ads whenever it can.
Is there a place on Google's website where I can find out the current bid prices for keywords and the number of times keywords have been searched?
Although it is not exactly what you are looking for, Bubzeebub, you can get traffic estimates, as well as estimates of CPC and Average Position, using the Traffic Estimator Tool.
From the AdWords FAQ:
How do I use the Traffic Estimator?
[adwords.google.com...]
BTW, the instructions in the link above assume you already have an account. However, if you are not yet an advertisers, you can still get to the tool from the AdWords homepage.
AWA