Help new owner

[London2013]

Hi I am new to this site and I have just bought a terrapin of gumtree, I had been reading up about them with the idea to getting one soon but after seeing this poor thing I had to get it.

I need help I'm unsure if it is a boy or girl

It does not seem to eat (but that could of been the stress of the move), it came in a tank which is more like a fish bowl, no lights, no pumps, no basking area.

The tank is a hexagon shape, it has a water mark line which is less than 4". My partner and myself bought a UVB lamp, basking lamp we put more water in that I think it has had before.

It doesn't seem to swim well and has a flaky shell and advice would be greatful.