Need advice on whether this car is worth pumping repair costs into or just moving on

Hello-
My car I've had since I purchased it with 155,000 miles has been great. It's my second Scion and I've nothing but good things to say about the brand.

However I've put about 40,000 miles on it and while it's still running currently, the following needs I've listed in order of how important it is:

1. Brakes rotors and pads rear and back need to be done ASAP.
2. The clutch is slipping badly for the past month, it's becoming almost undrivable, needs to be done ASAP.
3. The A/C stopped working, bad compressor (I live in Florida so A/C here is almost a must, but medium priority given the above repairs).
4. It has a slow oil leak that causes it to lose 1 quart of oil every 2 weeks, so I have to constantly keep an eye on it and fill it between oil changes. This doesn't seem to be getting worse but who knows. Medium/low priority repair.
5. Drunk driver hit it on one side and it is all busted up, doesn't look too bad but it's is still there. Clear coat is coming off on the back due to Florida sun. Tint is peeling off windows.

That said, I don't have much money and am rather poor. The car runs great and has been problem-free for me, very reliable.

My question is this: is it worth pumping all this money into these repairs (notably 1 and 2, but 3 and 4 need to be done too) given its age and mileage? Or should I cut my losses and just go find another used car with half the miles that I could get for the same amount of money used to repair this car? I'm only hesitant to do this because I know this car is reliable, but its getting old and not sure its worth it.

I was looking at some 2006/2007 Scions at some lots for like $3,000.00 to $4,000.00 range.

Any advice here would be great.