I was part of a robot team about 8 years ago so didnt really do alot as i was only 12 at the time, I just drove.... and in those 8 years ive built an antweight myself and have just started on my featherweight... SPEAK TO PEOPLE is my best advice and Listen and if possible Watch and Learn. There are lots of useful info on youtube etc...

The basic equipment:
Transmitter
Reciever
Aerial
Motors
Battery(s)
Speed controllers
Wheels
Chassis
Armour
Maybe even Gearing + Chains/Belts if your making a basic pushbot