Teams:
if you red then kill blue
if you blue then kill red
Classes:
Scout = fast runny double jumpy kill
Solider = rocket kill
Pyro = Fire kill [and rocket/bomb deflection with alt fire]
Demoman = solider but with bouncing bombs and diffrent aiming
heavy = short range minigun kill
Engineer = build turret to kill for you
Medic = un-kill people with the power of healing
Sniper = very slow charge up headshot kill
Spy = sneaky back-stab kill
Gamemodes:
Payload = blue push cart, red stop cart...if cart reaches end, blue win, if time runs out, red win.
control point = stand on point to capture, team with most points at end of time = winrar
other control point = like payload...but with control points instead
twofort = get enemy suitcase back to your suitcase[a bagillion times] to win
that's the basic game modes as it where...and a rather basic rundown of the game, good luck and have fun.