Hi and Welcome to Turtle Talk. First, have you read any of the information on the main website? If not, you can find it here.
http://www.redearslider.com
Most of the questions you have asked are subjective questions and based on what each individual prefers so for each person who responds, you'll get a diffrent answer. So without stating my preferences.. I can give you the general guidelines.
1. Great sized tank for a starter
2. You need a filter that is rated for 2-3x's the size of your tank. Which means one rated for 100-150 gallon tank. The ratings on filters are meant for fish that don't have a heavy waste load like turtles.
3. You need a heat light that is going to produce enough heat to maintain the basking area around 88-90 degrees. You can use a regular household bulb for this.
4. If you're talking about a UVB bulb.. 7-10% UVB is a good starting place. You can find these in most petstores and online pet sites.
5. The water temp for a hatchling should be 78 degrees older turtles 72-75.. basking temps around 10 degrees higher or 88-90.
6. You need a heater that is submersible and rated for your size tank. I believe a 200watt heater would be suitable for your sized tank. They are the same heaters you'd use for a fish tank.
7. You can offer feeder fish but they aren't necessary.
8. I'm not sure what you mean by live pics, but I'm going to assume you mean plants instead

You can offer most any, if not all, aquatic plants found in a petstore.
9. As for unique ways people set up their basking area, you can look at the photo gallery and check those out. It's easier that way
Check out the download sections for what to feed and guidelines for setting up your tank and the basic needs. Hope this has helped some.
http://www.redearslider.com/index_download.html#foods