bike pedals are easy to take off. most use a 15mm open wrench. remember the right side pedal comes off counter-clockwise but the left side comes off clockwise.
a good bike will have a quick release on the front wheel, making it very easy to remove. make sure that you undo the front brake calipers in order to remove the wheel completely.
i have a bike rack on my TV's bumper but i usually do what you do and lay them down in the bed of my Avalanche. still gives me space to put flat things on top of them, like chairs, tote tank and other things.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC