Re: setting basic pricing/paypal interface.
Your best bet is not to use the paypal buttons on the Bluevoda webbuilder. Just log-in to your paypal account and under 'merchant tools' you will see 'shopping cart'. Just go in there and create your products and prices etc. Then click on 'more options' and in there you can create drop downs for your options you mentioned.
Once finished it will give you some code, you just copy that onto your web page using the html box and this will generate buttons that when clicked on will take the customer to your paypal cart automatically.
Don't aim for success if you want it; just do what you love and believe in, and it will come naturally.