My first mentor recommended looking for 200 pips per month. However, I would say that kind of goal is highly dependent on how you trade. If you are taking trades off daily charts, banking 50 pips every day may be pretty tough.
As far as pairs to follow... I stick with the major currencies:
EUR, GBP, AUD, USD, CAD, CHF, JPY
And find the pairs that suit your system well.
I personally use:
EURUSD, GBPUSD, AUDUSD, EURJPY, AUDJPY, NZDUSD, USDCHF, EURCAD, CHFJPY, GBPCHF, EURAUD, CADJPY, GBPCAD, GBPAUD, AUDCAD, NZDJPY, EURNZD, NZDCAD
Hope that helps...
The Trend is your Friend. ~~