The hardest bit is finding the fish. When I was a kid I had started out with a cheap 6ft spinning rod and cheap reel from Woolies which I used to float fish from - and I regularly trounced the tackle tarts on our local pond primarily becuase the rod limited my casting range and it seemed all the big tench liked to patrol the margins. The tackle tarts were casting to the middle and beyond and netting the odd silver.
If the fish are there and they're hungry they will eat - the problem then is bringing them in. It is perfectly possible to have a general setup that will definetely catch fish - in danger of repeating myself but..this is my holiday/travel setup (obviously I supplement other stuff if I have the room):
a cheap (£25-£30) front drag reel (diawa, shakespeare, shimano - whoever, try the askari catalogue - they're all made in the same factories)
with - Two spools of line (most modern reels come with a spare spool) one at 4lb, one at 12lb should cover off all but specimen fishing
a 10ft multipiece/telescopic travel rod (£30-£80). (carbon fibre preferably - but don't be put off fibre glass if money is an issue, thousands of fish have been caught on fibre glass before carbon fibre came along )
a folding landing net
telescopic handle
some floats (one bubble, one peacock quill, one stick and a couple of crystal wagglers of varying weight capacity)
Float adapters (quick change silicon doobries)
some tungsten putty (this will double as weights or leger)
assortment of weights (not lead)
some wire traces
assortment of swivels
couple of spinners and lures (one small one medium - dispose with the treble hooks and replace with large singles to amke your life easier)
discorger
locking forceps
long nose pliers with wirecutters
knife
knotpicker
a small spool of 2lb hooklength
a small spool of 8lb hooklength
Assortment of barbless hooks, sizes 18-10 - pre tie these onto 10 inch long hooklengths (some venues have banned barbed hooks so I don't bother with 'em anymore)
Small reflective seat mat
knee pads
An old towel
Small tin of sweetcorn
1 pepperami (never cuaght 'owt on it and always resort to eating it myself)