Expext a dose of Thatcherism and cuts to some public services in order to balance budgets and a massive fight with the French Unions under Fillon (Thatcher smashed the Unions in Britain in the 1980's).
Fillon is right wing and although he does not oppose the EU like Thatcher he won't be that enthusastic over many parts of it, including current levels of non EU migrants and border controls will be an issue. So Fillon will push for change in the EU, rather than hold a vote to leave.
In terms of Le Pen expect a vote on France leaving the EU and an end to current immigration. Le Pen is actually a good leader and comes across well, however the National Front as a party has some very right wing elements bodering on fascism.