You cannot claim mileage... you MUST use the actual expenses ONLY ... this is why you do NOT NOT NOT use the vehicle expenses section as that will only confuse you further especially since you do NOT own the truck ... the FUEL should be listed as such in the other expenses section, the repairs and maintenance are entered in the categories named for the same. Other items like the radio, GPS and such are either supplies or entered in categories you name yourself in the Other Misc Exp section.
It sounds like you REALLY should either pay a professional to do this return and educate you OR read the links in the answer below to get educated on the Sch C.
