jaeezzy:
1) You can only use the 1.1GB image size for Debian apps. There are many posts in this thread and others discussing ways to increase the size of the Debian image (up to 2GB) or move the whole file system to a dedicated partition. This is fairly advanced stuff, however.

2) It sounds like you have outdated package lists. In Synaptic: Edit menu, Reload Package Information

3) If your keyboard is not working in LXDE, then there's something wrong with your install. If it isn't working when you run Debian apps in Maemo, then you might need to add the following item to your Personal Menu
If you have a non-English keyboard, you might need to visit fatalsaint's xmodmap thread and find debernardis' post about tweaking the map for an Italian keyboard.

4) To synchronise the date-time of Maemo and Debian:

From a Maemo terminal, issue the following two commands:
The next time you start a Debian app, the time should be correct.