Can anyone give me a few basic tips with my Suzuki GSF 250 '92 model?

[nos]

I've just bought my first bike and don't really know a lot about roadbikes at all. What is the PASS switch on the left handlebar about? And the PRI setting on the fuel tap? And what's the best way to warm it up in the morning? It seems to stall quite easily taking off in 1st gear. Should I get it tuned up or is it just me? I'd really like to know as much as I can before hitting the road (well hopefully not me!). Haven't got my licence yet so that's another reason I may seem so clueless. And also, is it a 5 speed or 6 speed cos the guy I bought it off said 5 but I'm sure I found 6.