Will these photos be okay?

I have some people I'm taking photos of. I asked them if they personally want some photos on a disk or on Myspace. Some said a disk so they could print them off.

I have a Nikon D3000 camera 10.2 MP and shoot JPG's. I have 4 picture editing programs on my computer.

GIMP
Picasa
Photoscape
Paint

So I'm really worried that if I take the photos from my 8GB memory card put them on my DELL laptop(windows 7) and edit some like sepia, B&W, and change the color of an object in the photo then put them on a CD and mail them to the person that when they print them out, the photos will be messed up.

Will they be?

That is difficult to answer.

When was the last time you calibrated your monitor?
When did the client last calibrate theirs?
Where will the photos be printed, and will that place "auto-correct" colors?

I calibrate my monitors monthly (or anytime there's a driver update). The photo lab I use handles photos one by one (not just batch processed by a machine), and they do not do any color correction unless it is requested or if something looks out of the ordinary (and then they call to notify and see what actions you want taken).

Take into consideration what BEI said, and also, never ever ever under any circumstances give the fullsize files to anyone! It would be better if you print them yourself

No one on here can possibly answer that properly.

We don't know what they are like in the first place
we don't know what colour mode you are doing them in
we don't know what resolution you are sending them
we don't know about your monitor calibration
we don't know how/where the other person will print them
we don't know whether they will have any idea how to do them properly
we don't know how their/their printers monitor will be calibrated

etc etc etc

I have seen and resisted answering some of your other questions but i think this might be relevant to you… Http://www.facebook.com/album.php?id=339430113105&aid=194648#!/photo.php?fbid=10150119106053106&set=a.420202568105.194648.339430113105&theater

Honestly if you dare upload them to Myspace you're already screwing them up. Even Facebook doesn't have good resolution quality. Anytime you pass a photo from one site to another it downgrades the quality. To honestly keep it in the highest quality form you would need to figure out where they are going to print the photos and adjust the setting of each photo to where they would be printed. Not I know not every goes to this extent for clients but sending a them on a CD has always been better than having someone print them off a website unless you are giving them a version that is higher quality than the standard megapixel and in a format that isn't JPEG.

In practice and in reality you'll be fine, especially at your level. Just make sure when you burn them to a CD you use a completely normal standard, use Windows itself to burn them. Nero used to be used a lot to burn data CDs and those discs wouldn't work on a machine that didn't also use Nero. When you become a serious pro you might want to consider some of the things mentioned in other replies, but you'll be fine. Your images will come out the other end just fine. Always make back ups though and keep the original images safe in a separate folder and only work on copies of the files.