how many pieces of auto reversing track do i need for a trolley run? and can imix it with standard ez track?

a little careful inspection showed broken wire to front powered truck. no wonder it was slipping...motor is older style worm drive...no way for those front wheels to turn with a still worm gear!! so,repairing or replacing front truck...i can only hope wite didnt "melt off" due to bad motor. thanks again for any replies!!!

ok to go one step further,i used to do quite a bit of "model railroading" bk in the 70's and 80's....so i have been 'out of touch' with trains for a very long time. i do have some older locos from that era from various mfgr's...and i do remember them having traction tires. i looked at a pic of a new powered truck for my 41-0804-14 bachmann switcher.....i do not see traction tires there illustrated...did they in fact use them? this slipping condition is new experience for me.. the bf snot DID in fact  improve another small RSO switcher.....and as i stated in other posts...i use a 'pulse power' powerpack because i like that creeping start,like real life. this loco  slips with or without cars...any help apppreciated.

is anyone having trouble with 'slipping loco drive wheels' on ez track? am i missing something. i recently purchased two older AHM engines,and i have some older bachman locos...all slip whether i have cars attached or not....help please?