#1 I bought a jetta a year ago and the reverse went out

What is your question?

And all the other gears work life But when I put it in reverse the gear pops out and it looks lik the front driver TIRES Gunna pop off I don't know what it is and how much I'll need to fix it #2 also I it has new breaks but when I push down to break it's doesn't stop it feel lik air what can I do