Yeah. Look up Sheldon Brown and then key words for what you want to do. For example "sheldon brown wheel bearing adjustment" will give you Sheldons page on adjusting hub cones. If your wheels spins smoothly and freely and seems like it's been maintained recently, it may not need re-greasing. Same with the headset and bottom bracket bearings. Otherwise, as mentioned before, check the chain and freewheel for wear, brake and shifter cables, etc. I would recommend just going to a local bike co-op if you have one or posing a WTB on your local CL in the bike section and seeing if anyone has any cheapo pedals you can put on it for now. I'd bet you can easily find some cheap flat pedals for $5. And feel free to use flat pedals in general. You don't need toe clips or clip-less and special shoes. I ride flat pedals on my bikes. ...Not $5 ones, but flat pedals none-the-less. What kind of pedals you get just depends on what kind of riding you want to do. If you don't care about going very quickly or accelerating quickly in a race, I don't think there's a big need to have your feet stuck to the pedals so that you can get max power by pulling up with your back foot while you push down with your front foot.