dotamasta

For TVM I recommend you Elan Guides, but they multplied by 3 the cost of their material (ebooks) so better try an on-line resource.

In example: investopedia.com

Also the AnalystForum's application (it's made using Java) is recommended.

I recommend you to read the calculator manual, has very interesting recomendations.

Also start reading FRA (memorize formulas in FRA, specially ratios) and Economics, as soon as possible.

But before doing TVM problems I suggest you start with Ethics.