Looking for Answers about Canon Canon PIXMA MP250 Photo All-In-One Inkjet Printer/Copier/Scanner?

Yes. It has a flatbed scanner for copying one at a time.

Yes! It's easy just scan the document (lay it face down on the scanner bed, close the lid and push the SCAN button) ,push the + button until the number of copies you want shows on the screen, and push the Black or Color Start button depending on if you want black or color copies. :)

Yes, according to the manual.

Works with XP (I have that) and it says it works with Vista and Macintosh too.

It comes with a short supply, but I recommend you purchase Canon 210 and 211 cartridges to have on hand when you run out.

yes

It comes with a short supply of black and color, but I recommend you buy Canon 210 and 211 cartridges to have when you run out.

Yes!

No.

No, it does not

According to the manual, the first OS it is compatible with is Windows 2000.

it probably only goes back to xp

If the Dell Dimension 3000 has Windows 2000 or XP or Vista, it is compatible, providing you load the drivers properly from the CD disk provided.

yes, it goes to usb

It uses Canon PG-210 and CL-211.

color is 211 and black is 210

You can also purchase 210 XL & 211 XL for more ink capacity

using refilled cartridges almost always voids the warranty on any printer. might want to check that either on canon's website or in the paperwork
appears the cartridges are
pg 210 for black and cl211 for color
they don't necessarily need to be changed at the same time --- depends on which is out

It comes with a short supply of black ink and color ink, but I recommend you buy Canon 210 and 211 to have on hand when you run out.

Comes with both!