My fiance and I went to her house today and picked up a couple of bikes...one was a Huffy Windsprint and the other a Superia 50. What do you suggest we replace to make them a little more up-to-date? I know nothing and she is about in the same boat. The bikes are basically gonna be used for recreational/exercise purposes. Please help.

Ride them as is. If and when something breaks/fails, then replace it.

I have to start with wheels/tubes first...they are shot completely. Any brand suggestions? I'm gonna tinker with them and get everything lubed up and whatnot...adjust the cables and stuff. How do I know what size chain I need? they are both pretty rusty.

Try this:

Go to Walmart and see what a brand new comparable bike costs. While you're there price out new tires, inner tubes, chains and any other parts you think that you might need. How close are the two cost numbers?

Googled the Huffy and it looks like an old 10 or 12 speed. Most on these forums say to ride what you have now to see what things bother you and what style of riding you wish for. If speed is your thing your bike choices will tend toward road bike or cyclocross types. If leisurely, relaxing rides are your desire, look at cruisers, comfort bikes, crank forward bikes like Electra Townies, Giant Suede , Trek Pure, etc.

If you don't want to work on the bikes because the cost is too much or the work is not for you, then post again with distance planned, terrain, previous experience, so people can help.

working on them isn't gonna be a problem, neither with money or know how. I'm gonna use them for exercise/road biking. I have pretty much no experience with road bikes. I found out that tires/tubes from walmart is gonna be about $50/bike.

at walmart (where i am) tires are about $20, tubes are about $3. where's the $50 coming from?

but for what you get, even ~$25/bike is pricey. go to your lbs and see what they recommend. bike shops seem more willing to work on a budget now.

If money is not a major problem, I would get another bike, huffys aren't known to be good bikes anyway and you can probably get new ones for the price of updating those. Or save up for a good brand bike that you can use for years and will have good value down the line.

If you are intent on staying with these, there are a few major things to do. Best thing is to find a performancebike near you if you can, they're the one-stop-shop for bike parts. If not, find a local bike shop (LBS) that will work for you.

1) Tires, Tubes. You can get tires for about $10 each at Performance, tubes at $3.
2) Fix up the brakes. Make sure the cables are good, they pull strong and smooth. Replace the pads for about $8 a brake if you get kool stops.
3) Cabling, replace cabling everywhere. Not quite sure of the pricing on cables. I'm guessing about $20 a bike.
4) A new chain, $15

After that, find parts that need to be worked on individually.

the tires are like 15 I think and the tubes are about 3...I was also figuring in tax. Buying new bikes isn't an option at this point and I'll have to find a LBS because I don't know of any Performancebike shops around me.

just went to their site, there isn't even one in TN. lol

How do I take the crank assembly off? I was trying to take everything apart to give it a good cleaning and this is the only thing I have left.