Rather than a DSLR, you might want to consider something like this:
Just a moment...
That is one of Canon's best "point and shoot" cameras. It doesn't use interchangeable lenses, but it has a HUGE zoom ratio. Absolute image quality isn't quite as good with a zoom as with a fixed focal length, but for pretty much anyone except a pro photographer it will do the job.
B&H Photo is a very reliable seller. They are Orthodox Jews, so they do not sell from sundown Friday until sundown Saturday (NY time) in observation of the Sabbath. Their prices are good, shipping is VERY quick. I've ordered from them several times.
As for printing, a photo printer is best. The most important part, though, is the paper. You need high quality glossy photo paper to get the best images. I like Canon photo printers, but I'm sure HP is good, too. Epson printers also make great images, but I've found that their print heads clog more than the others.
There's also nothing wrong with taking a thumb drive or memory card to CVS, Walgreens, or even WalMart to be printed. You can also order prints online from Google, Shutterfly, and a number of other places. They mostly do a pretty good job, and the cost per print may be less than purchasing a photo printer, relatively expensive photo paper, ink, etc.