20th century boy by marc bolan and t-rex
standard tuning

Main Riff

G|---------------------------------------------------------------------------|
D|---------------------------------------------------------------------------|
A|---------------------------------------------------------------------------|
E|-0-0-0-3-0-3-0-3-0---------------------------------------------------------|
for duration of the main riff

the verse is a combo of the main riff and the below... you need to get the rythym to do 
below tune correctly, just place the 7's in with the drum beat

G|-----------------------------------------------------------------------------|
D|------------7------7------7-7-----------7-5----------------------------------|
A|----0-0-0-0-----0-0-0-0-0-----0-0-0-0-0-----7-6-5----------------------------|
E|--------------------------------------------------7-5------------------------|

Usually you do the fill, for example when he says the line "and babe i wanna be your 
then you kick back into the main riff.

Chorus riff below
G|---------------------------------------------------------------------------|
D|---7-7-5-7-7-9-9-7-9-9\----------------------------------------------------|
A|---------------------------------------------------------------------------|
E|------------------------0-0-0-0-0-0-0-0-etc--------------------------------|
   you hit the opens (0) when he sings "im your toy the 20th century boy"

the post chorus bit thing "20th century toy, i wanna be your boy" is
G|---------------------------------------------------------------------------|
D|---------------------------------------------------------------------------|
A|--7-7-7-7-5-7-7-7-7-7-7-7-7-7-7-10-7-7-7-7-7-7-----------------------------|
E|---------------------------------------------------------------------------|

The alot of the fills are just octaves of these notes, other then the ending where he 
lots of blues scale based licks but you dont neccessarily need these to be in tune.

so basically repeat all these parts when neccessary, its easy to work out the order of it.