As you found me irritating, you'll be relieved to hear that, for obvious reasons, I hardly appear in episode 3, but I wonder I what I would make of you?!
As to your substantive questions:
What did you base your trades on after the two week training?
No specific rules, we each did our own thing, initially within FTSE 100, later anywhere. Some traded on news, some on TA, some on FA, some on whim. Only high level rules were fund size, % in any one trade, % long vs short.
Did they give you any entry / exit criteria?
Various systems were discussed during the training, but none was imposed
Was there any system you or the others used?
Nothing specific initially, though the better traders developed their own over time. We were all exhorted to build a balanced portfolio (long v short, sectors etc), with an overall bias in the direction in which we thought the market was heading.