I have a TCP, it's the best pocket pistol in .380 I've shot. The LCP is very similar, but lacks the last round slide lock feature that I prefer. It's a helluva lot nicer than the Kel-Tec P3AT I owned previously, I hated that pistol.
As for ammo, .380 has been always tough to find as it is essentially 9mm in a short casing (in Europe it's known as 9mm Kurz, or 'short' in German). I thought looking online, but SlickGuns doesn't list any nor does AmmoEngine and the prices on GunBroker are ridiculous. Just be persistent and try local sources, Academy stores are pretty good here.
Good luck! M2