here's a good source for decal making supplies:
http://www.papilio.com/index.htmlanother suggestion: get an older copy of Corel Draw like Corel Draw 12. they are very cheap if you shop places like eBay. Testor's also makes a decal making program called Sure Thing Decal Maker. the biggest advantage to it are the pre made images. personally, if i had thought of going the Corel Draw route first, i wouldn't have bothered with the Testors program.
for printers i have always preferred Epson. it was the first brand of printer i bought and all subsequent printers have been Epson. i prefer their Stylus Photo line. again, no real reason other than i like them because they work well, are dependable, and the ink cartridges seem to stay available for a long time.