Anyway I guess what you really wanted was some useful help.
> 1. Why when it is printed i get rubbish?
When what is printed? What option did you choose? What output did you get and what output did you expect?
Have you identified the line of code that prints wrong stuff?
If the output is unprintable and you're using a Unix-style OS then redirect the output to a file and use od -x -c to display the output. Or just pipe the output to od -x -c, but sending it to a file gives you the option of keeping it around for future reference.
What exactly does LoadStudents() do? Specifically the "a+" parameter of fopen? (Note I'm not asking because I don't know. I'm asking because I want *you*, Mr Smart Alec, to find the answer out for yourself)
2. When i search for the ID, how can i display the entire information for that ID?
Maybe with printf()? Could there be something in SaveStudents() that you could use? (Look again if you think the answer to that is "no")
3. Im lost to how i am suppose to update the file
Probably that will be the subject of a future lesson. Have a look at LoadStudents(). It seems to be missing a lot of stuff. Is it meant to read the file into a data structure? Typically what you do in a program is to read a file into some internal data structures, process the data, and if you need to update the file on disk then you would write the data structures back out to the file. So in effect you don't update the file directly. Since the data is not fixed length you don't have the option of using fseek and fwrite, so you'll have to overwrite the whole file from the data structures.
4. Is the loading function done correctly
I've already alluded to one possible answer to that question. But what do you think? What should the function do? What does it actually do (hint: RTFM for fopen())? Do you think it might need to mirror SaveStudents()?