(Does that mean to start with, I should do MCTS for web applications first and do those two exams before I do the upgrade exam to get MCPD? Should I also focus on learning .NET 2.0 first or should I go directly for .NET 3.5?)
In Asp.net you must start from 2.0 so you can know the new infrastructure with application services, master pages, custom controls and other things all new to 2.0 and are still in use today in 3.5
(I have also noticed with the MCTS that I would need to know C# so in addition to the two exams for MCTS,)
Yes you need to know C# to get MCTS in C# for Web application because most of the tools you use are C# classes that is the reason for exam 70-536 which covers the language end of the certification.
I have covered materials that will help with all three exams in the thread below read my posts carefully and post more specific questions.
(Do you think I should ditch the idea of following the MCAD path on route to achieving my MCPD?)
Yes Microsoft is about to discontinue the exams for MCAD so take MCPD it is also three exams with new materials.
http://forums.msdn.microsoft.com/en-US/CertGeneral/thread/952184a1-e585-457c-bbe6-5b8f120cb08f
Asp.net MVP, MCPD Web C#, MCITP BI & MCTS SQL Server 2005
