No you really don't need any extra drivers, use the multiplexing method.
http://melabs.com/resources/articles/ledart.htm
http://melabs.com/resources/samples/pbp/7segment.pbp
http://www.picbasic.co.uk/forum/showthread.php?t=1044

for the ADC, you may want to use ADCIN. Simple search within this forum will give you few hits Also, have a look at the following
http://melabs.com/resources/samples/pbp/adcin10.bas
http://www.rentron.com/four-channel-ad.htm
http://www.rentron.com/PICX2.htm

HTH