Red triangle and friends

Started up my 2006 with 99,810 miles today, and saw the red triangle plus several other warning lights. See attached photo. Extra beeping sound, and middle console screen has red car outline with exclamation mark. I'm seeing in the forum that this could be a number of things.

Car is in my garage. I'm not clear on whether I can drive it or not. Considering whether to buy one of those little readers to figure out what's wrong, but would this one do the trick?

Kinda freaked, as I've had a number of big expenses lately, and wasn't counting on a hybrid battery failure. Does anyone know:
a) what the problem might be,
b) whether I can drive it, and/or
c) whether it's worth buying an OBDII to self-diagnose.

Also, if I can't drive it, need to look into AAA to see if their towing service kicks in immediately after signing up...I don't have AAA because I drive a Prius. I knew I shouldn't have detailed it last week...

 

Thank you so much for your replies. I hadn't updated my email address, so wasn't notified of them, hence my delayed response.

I already went ahead and bought the device that I pasted the link for in my original post. I got this screen, but don't really know what to make of it. It also says that this vehicle has no fault codes, so I think this thing is going to be going back to amazon.

What it looks like I need to do instead is buy an adapter like OBDLink LX. I have already downloaded the Hybrid Assist app, based on the info in the link from ChapmanF. Does that sound like a good next move?

 

Hang on...on the Amazon page for the OBDLink LX, it says it's not compatible with hybrids. What's up with that? It was specifically mentioned in the Gen2 OBD2 app review thread.

 

Well, just to give some closure to this thread, here's what ended up happening. Had it towed to a garage that I trust, where they diagnosed the hybrid battery as going bad. It was completely drivable they said, although I would not get the gas mileage that I normally would get. They quoted me $2500 parts and labor for a reconditioned battery. I told them I wanted to think about it, and drove home. The hybrid battery charge showed things very erratic on the way home, two bars, followed by all green bars, etc.

Did some research and found that reconditioned was not the way that I wanted to go, because I intend to keep the car and not sell anytime soon. Called a Toyota dealer and they had the new battery on the shelf at a cost of $1900. They said if they installed it, it has a 3-year warranty, but if I bought it and took it to a garage and had it installed there instead, it would be a one-year warranty. The dealer quoted me $3,600 for parts and labor. I called other dealerships for comparison and one came in at $3400 and one came in at $4,400(!). So I went with the one for $3,400 and will have a 3-year warranty.

Sadly it was the hybrid battery, but at least it wasn't $10k to get it fixed like I was thinking it would be.

Thanks to all for your help on this.