Hello!!

我又买了一个(间)洋房   （You mean you bought a house already and now you bought another one?----because of "又"）

今天我买了一个(间)洋房， 是十万钱（元 or 块----钱 =money；元、块= dollars）。

这个洋房有很多房子（房间----房子=house；房间=room）和有（you already wrote 有in the front so don;t need to repeat here）一个花园。

我的花园很漂亮， 里面有美丽的花。

在花园旁边是无（五）个车库， 但我只有四个（辆 or台---they are the right words to use if you want to describe how many cars are there.）车。

我也(only use 也when you want to compare with others. just like "too" in English.)有两个阳台。在我的洋房里有十五个(间)房子（房间)。我有一个客厅，在客厅里有一个（台）电视。 在我的客厅旁边是两个（间）书房，里面有很多的书和笔。我也有两个(间)厨房，五个(间)洗手间，两个(间)洗衣房，两个(间)餐厅，也（还有）五个(间)卧室。

W哦买了一个很多洋房 :)  -----Don't understand here??

(而且，我不买了一个洋房，这是不对）----Don't understand here too??  Do you mean, actually you didn't really buy a house? If that, will be "其实，我没有买一间\一栋洋房。这不是真的。-----Actually, I didn't buy a house. This writting isn't true."

Some tips:

1. The word 洋房.  I seldom hear people use this word. We use 别墅 nowadays.  洋房is a really fancy house, western style, and had been built for a bit while. Old,fancy, western style house.

2. Practise 量词 more.(Don't know that word量词in English....) Example:  1) 间 for 房间---一间房间   2）台 or辆 for 汽车---一台汽车，三两车....Chinese has many combos with different nouns if youo want you count the numbers of them. It's one of the most difficult grammar points in Chinese! So take it easy if you don't do a great job in the first time XD

3. JUST KEEP TRYING AND PRACTISING!!! You already did a great job since you are willing to write someting in Chinese!!! Great!!!

Hope my corrections help!

If you have any question while learning Chinese, you are welcomed to message meXD!

Ruby