Q: Is there a way to increase the resolutions of pixel count on an older photo

Some apps, like Photoshop, have a feature that will do this.

http://www.dummies.com/how-to/content/how-to-resample-images-in-photoshop-cs6.ht ml

But be warned: it does this by interpolating pixels between the ones that are there and guessing at what they might be like. To quote from the page linked there

Resampling isn’t a recommended activity, especially upsampling. As smart as Photoshop is, having to manufacture pixels isn’t an exact science. Your image tends to lose detail and sharpness. Your resampled image never looks as good as the original and may be blurry.

Try the fee "online image enlarger". It has several  resampling modes and tries to preserve the sharpness of the edges. I'll post the link when I get back to my desktop computer.

It will not be perfect, but give it a try.

Found the link:  Online Image Enlarger.

I am using it frequently to enlarge the stamp sized photos people keep mailing me to a reasonable size.