Database structure

Hello experts.
I need help with database structure of a website where a client can insert and sell his car,truck,bike....a.s.o.
(lIke ww.mobile.de)
I have construct this  using static cfm pages for all the inputs.
This is not flexible for changes i want to do with styling or validating a.s.o.  and i don't know if this is the right way. That s why i desided to handle this with Database tables.
I post here a structure i have tried.
Please tell me your opinion and your suggestion.

Database tables

1.attributes
attr_id  attr_type attr_pagetype  subcategoryof attr_label       attr_class  attr_inputtype          attr_validation
1         MAIN        INSERT       0             NULL               NULL       NULL                    NULL                      
2         SUB         INSERT       1            (label_of_input)             Text                    (some_validation)
3         SUB         INSERT       1            f.e. COLOUR                  Select                  (some_validation)
4         SUB         INSERT       1            (label_of_input)             Checkbox                (some_validation)
6         MAIN        INSERT       0             NULL               NULL       NULL                    NULL  
7         SUB         INSERT       6            (label_of_input)           (Text/Select/Checkbox)    (some_validation) 
8         SUB         INSERT       6            (label_of_input)           (Text/Select/Checkbox)    (some_validation)
....
45        MAIN        SEARCH       0             NULL               NULL       NULL                    NULL 
46        SUB         SEARCH       45           (label_of_input)           (Text/Select/Checkbox)    (some_validation) 
........  

2.attributes_text
attr_id   attr_text                language
1         General attributes         EN 
1         Allgemeine Eigenschaften   DE
......

3.attributes_options (for the selects)
attr_id   option_value   option_text  language
3          1              Black        EN
3          1              Schwarz      DE
3          2              Red          EN
3          2              Rot          DE
......      
4.mobiles
mobile_id  mobile_text
1           car
2           truck
.......


5.mobiles_attributes
mobile_id     attr_id   attr_pagetype
1              1         INSERT
1              2         INSERT
1              3         INSERT
......

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