are the pots on a tele CTS?
On an American Tele, yes, they probably are.
are they any good,need replacing?
They're fine.
are they the same size 'n shitee as the ones on a LP?
Yes, but the ones on an LP probably have long shafts, Tele will have short, solid shafts (for the screw-on knobs)
do they do 250 and 500 like a les paul?
They do.
what is the standard issue and values on a modern tele?( caps and pots)
250k pots, 0.022 cap. Older/vintage style Teles might have 0.047 caps.
what do most guys upgrade to (values) and why?
On a US Tele, they really don't need upgrading, unless you want a better quality cap. The pots are perfectly good.