thanks, now to google those things

hi, i am very new to arduino and have little to no experience with this type of hardware

 and was wonderin if i was to connect some motors to my arduino can I construct or buy somethin that would allow me to run power to the motors without running it through the arduino?

  (the electric moters i was planning to use come from a toy bulldozer and use 4 or maybe 6 D -ize batteries and i dont think i should pull that amount of current or power through the arduino circut)

any help would be appreciated