I'm not Sir McCoy (nor am I even a knight) but I can try to take a stab at your question.
Dubspot does a lot of great tutorials and extensive training for Ableton. This video on Youtube from them is one I've used to learn to warp full tracks:
PRO TIP: A lot of tracks that get garbled when you warp them will sound better when you use COMPLEX PRO mode in the loop menu.
Here's Matt's video on adding band cues to an Ableton session:
I use a separate click track on all the tracks I produce (in addition to the band cue track) but I know lots of LCers use the Ableton click and fancy workarounds to get the right subdivisions, etc. Generally (unless it's something with odd meter switches like How Deep the Father's Love) I will create a 1-bar click and loop it through the whole song and then stop it at the end so there's not too much click bleed. You can also automate the volume so it's louder on loud sections and vice-versa.