I would not recommend Faro as an arrival point for Tomar you will spend the best part of the day travelling. If low cost flights are part of the issue, Porto is probably better.
In the event of coming via Faro:
1) Remember one has to get from Faro Airport to either Faro Station or Faro Bus Station. Buses are not that frequent and you may have to taxi it which will cost +- € 10.00+.
Cubsur has the times on his excellent site:
See: http://bit.ly/c2NFqI
I have posted a timetable extract from the Portuguese Railways (CP) Summer 2010 here:
http://scr.bi/9P7XSV
Bear in mind that the winter timetable from late September will probably has less frequencies.
2) Rede Expressos
Current Timetable here: http://scr.bi/cNoxXB
In the event of coming via Porto:
3) Bear in mind you will have to allow 45 minutes at least to get by Metro from Porto Airport to Porto Campanha stattion.
I have posted a timetable extract from the Portuguese Railways (CP) Summer 2010 here:
http://scr.bi/9NLtrW
Bear in mind that the winter timetable from late September will probably has less frequencies.
2) Rede Expressos
There is only one service per day by bus:
Porto: 14:00
Tomar: 17:35
Tomar: 07:00
Porto: 10:55
