My gutair is missing a string,and the thing on the neck that the string goes through. Can you fix it,and if so how much

Guitar center has a real good guitar tech he can fix just about anything new set of strings are about $5 and the thing through depending on what kind of guitar it could be anywhere from $2 to $10 or more give guitar center a call and I'll be happy to answer your questions

Depends on who's working

You can pay for your strings to be fixed and be out of the store and a matter of a few minutes