как перенести один домен из 2-х, которые обслуживает движок?

[Gleb]

TYPO3 linux package is devided into two parts - source (engin) and site (e.g. dummy). The site doesn't include the engin. Instead it has links to typo3 src directory (typo3_src -> ../typo3_src-3.7.0/). So your example w/o changing the links:
1. Untar typo3 source to /wwwhome/ Will look like this:
/wwwhome/typo3_src-3.7.0/
2. Make directories for sites and untar dummy package in each of them:
/wwwhome/typo3.ru
/wwwhome/typo3.de
/wwwhome/typo3.ca
After untar the links to typo src already there you do not need to change them.
3. Create databases for each site:
t3ru
t3de
t3ca
4. As you said install DB.