Where can I get 4x6 pics of myself?

Use the camera of your choice to take some self portraits, and actually put some effort into lighting and composing the photos so they look good. Be sure to get the focus and exposure correct so you're not printing out crappy pictures. Then take the memory card to the store of your choice with a photo counter (or upload to their website if they have that option) and select which photos you want. Go through the process of selecting print size, print type (glossy, matte, metallic, etc.), doing any necessary cropping, etc., and then select to print. After waiting however long it takes to print, pick them up at the photo counter and pay for them. If you go through the store's website you can probably pay for them online as well if you don't want to pay when you pick them up.

Alternatively there are online photo printing services such as Adorama where you can order prints and have them mailed to you. This will of course take longer than it would by getting them printed in a store or camera shop, so take that into consideration, too.

I've gotten many prints done at my local grocery store, in several sizes from wallet size up to full 8x12 or 8x10 size, and gotten them in all the print types including metallic, and they look fantastic. It doesn't matter if I use an 18MP DSLR camera or an 8MP point and shoot camera, the printing process makes them look great (as long as the photo looks great to start with). BTW, the metallic prints are printed on something like pearl paper which has a cool reflective sheen in the paper to make the highlights look like they're practically radiating light, such as in one photo I took where a sunrise is reflecting off of ice in the winter. It adds some depth to the photo. There are also genuinely metallic prints done on a sheet of aluminum; those are available from Adorama, and also the local store may offer that as well like mine does.

Studio.

From the photographer that took them!

Photobooth

Go to a photo booth