my “new” ford has little shit

Hi, yesterday I bought my first car *joy* and *megastolzdraufbin* well, it’s 1.4 with 71ps. he’s 83tkm down and cost me 500€ with all the shit. Well, in any case, the macks (are almost only beauty mistakes) have to be fixed. only I’m a student and my budget is very limited. so I have to take care of it myself now: 1. the rear left window pane doesn’t go down. only that makes itself more difficult than thought. I removed all visible screws and wanted to remove the cladding only where was it still attached. I just don’t know where. it made the appearance as if it were somewhere, in the area of the window curlers. only I couldn’t find anything. maybe you can help me with that. 2. as said the car has 83tkm down and the salesman said that now soon the tooth strap has to be made. only when and where is it at bill igsten. don’t think it’s the best thing to do at ford. don’t you think? I wonder if the pulley, what’s it for, has to be done? think that you can only decide on the spot. does the price come with pulley of 160€? the seller meant the cost it at pitstop. will certainly be cheaper somewhere else. right? 3. the car has small (5) small rust spots with a diameter of 0.5 cm. how do I get the self a 4. that closes from the tank lid hacks extremely…sat yesterday 3 min before I got it out again. think with a bit of closed spray that will definitely go again. so the wra already with the known faults. since I am young and for, as perhaps others would say, snaps of interest, I wonder what can be be embellished for so little money on the car. thought there itself so of white tacho disks. by that I mean the dinger, where the km/h number and the dreahzahlbereich etc. is shown. is there for it available? so now to the radio. as I said my budget is very limited and it only extends for a billisystem that can cost me incl. mp3 radio, amplifier, and boxes max. 150€. thought there itself so much used goods from ebay. only I don’t know about it. can maybe someone put together a “good” for the price? many thanks already in advance!